Ch6 Evans BA1e

8/10/2019 Ch6 Evans BA1e

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A discussion of different sampling techniques within the context is required.


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Credit Risk Data

Count Loan Purpose Checking Savings Months Customer Months Employed Gender

1 Small Appliance $0 $739 13 12 M

2 Furniture $0 $1,230 25 0 M

3 New Car $0 $389 19 119 M

4 Furniture $638 $347 13 14 M5 Education $963 $4,754 40 45 M

6 Furniture $2,827 $0 11 13 M

7 New Car $0 $229 13 16 M

8 Business $0 $533 14 2 M

9 Small Appliance $6,509 $493 37 9 M

10 Small Appliance $966 $0 25 4 F

11 Business $0 $989 49 0 M

12 New Car $0 $3,305 11 15 M

13 Business $322 $578 10 14 M

14 New Car $0 $821 25 63 M

15 New Car $396 $228 13 26 M

16 Used Car $0 $129 31 8 M

17 Furniture $652 $732 49 4 F

18 New Car $708 $683 13 33 M

19 Repairs $207 $0 28 116 M

20 Education $287 $12,348 7 2 F

21 Furniture $0 $17,545 34 16 F

22 Furniture $101 $3,871 13 5 F

23 Furniture $0 $0 25 23 M

24 Furniture $0 $485 37 23 F

25 New Car $0 $10,723 11 15 M26 Business $141 $245 22 33 M

27 Used Car $0 $0 19 58 M

28 Used Car $2,484 $0 49 46 M



31 Education $335 $1,708 37 7 M



34 Business $16,647 $895 16 34 M

35 Business $0 $150 49 46 F


37 Furniture $0 $162 25 1 M



40 New Car $0 $128 13 74 M

41 Other $218 $0 49 0 M

42 Used Car $0 $109 25 26 M


44 Furniture $664 $537 31 33 M


3/74

45 Furniture $150 $6,520 12 1 F


47 Furniture $216 $0 19 3 F

48 New Car $0 $660 17 75 M

49 Business $0 $724 25 8 M


51 Small Appliance $265 $947 25 5 M52 Furniture $4,256 $0 16 36 F

53 Business $870 $917 28 6 M

54 New Car $162 $595 22 10 M

55 Used Car $0 $789 25 28 M

56 Education $0 $0 37 114 M

57 Furniture $0 $746 13 16 F

58 New Car $461 $140 19 32 M

59 New Car $0 $659 19 5 F

60 Furniture $0 $717 37 60 M

61 New Car $0 $667 29 10 M

62 New Car $580 $0 11 8 M


64 New Car $0 $1,366 19 17 M


66 Small Appliance $0 $14,643 16 115 M

67 Business $758 $2,665 13 31 M

68 Used Car $399 $0 31 0 F

69 Furniture $513 $442 7 0 M

70 Furniture $0 $8,357 25 5 M

71 New Car $0 $0 22 9 M

72 Small Appliance $565 $863 10 81 M73 Business $0 $322 28 28 M

74 Furniture $0 $800 13 69 M


76 New Car $166 $922 13 2 F

77 Business $9,783 $885 13 3 F

78 Business $674 $2,886 49 32 M

79 Repairs $0 $626 43 0 M

80 Business $15,328 $0 25 9 M

81 New Car $0 $904 12 6 M

82 Education $713 $784 61 17 M

83 New Car $0 $806 19 3 F

84 Education $0 $3,281 19 20 F

85 New Car $0 $759 16 59 M


87 Used Car $0 $104 37 25 M


89 Small Appliance $900 $1,732 37 11 F

90 Furniture $0 $706 31 14 M

91 Education $1,257 $0 10 65 F


4/74


93 Repairs $273 $904 7 2 M

94 Business $522 $194 25 79 M




98 New Car $0 $637 13 21 F99 Small Appliance $514 $405 49 13 F

100 Furniture $457 $318 19 108 M


102 New Car $0 $369 10 16 M

103 Retraining $644 $0 13 88 M

104 Furniture $305 $492 19 1 F

105 New Car $9,621 $308 25 41 M

106 Education $0 $127 13 22 M

107 Business $0 $565 19 14 M

108 Furniture $0 $12,632 16 9 F

109 New Car $0 $116 49 45 M

110 Used Car $0 $178 13 89 M

111 Small Appliance $6,851 $901 13 21 F

112 Furniture $13,496 $650 19 20 M

113 Business $509 $241 25 14 M

114 Used Car $0 $609 37 6 M

115 Furniture $19,155 $131 25 24 M

116 Furniture $0 $544 19 15 F


118 Used Car $374 $0 25 14 M

119 Large Appliance $0 $409 49 15 M120 Furniture $828 $391 9 12 F

121 Furniture $0 $322 13 9 F



124 Furniture $0 $479 19 0 M

125 New Car $939 $496 19 56 M

126 New Car $0 $466 25 42 M

127 New Car $889 $1,583 37 79 M

128 Furniture $876 $1,533 31 21 F


130 Business $12,760 $4,873 13 73 M

131 Furniture $0 $0 13 94 M




135 Other $0 $0 25 54 M

136 Business $0 $104 25 23 M

137 Repairs $0 $897 19 2 F

138 New Car $698 $4,033 16 20 M


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139 Furniture $0 $945 13 6 M

140 Furniture $0 $836 25 99 M


142 Small Appliance $12,974 $19,568 13 7 F

143 Furniture $0 $803 13 89 M


145 Business $0 $265 13 10 F146 Repairs $0 $609 31 3 M


148 Furniture $192 $199 25 5 F

149 New Car $0 $500 28 7 F

150 New Car $0 $509 16 3 M

151 Used Car $0 $270 25 25 M

152 New Car $0 $457 13 63 M

153 Used Car $0 $260 25 78 M

154 New Car $942 $3,036 25 36 M


156 New Car $3,329 $0 19 15 M

157 Used Car $0 $6,345 25 19 M

158 Education $0 $922 37 9 F

159 Furniture $0 $909 25 3 M

160 Large Appliance $0 $775 19 8 M

161 Furniture $0 $979 25 48 M

162 Furniture $0 $948 19 2 F

163 Business $339 $2,790 22 55 M

164 Used Car $0 $309 49 37 M


166 Small Appliance $0 $970 13 14 F167 Used Car $105 $320 28 54 M


169 Repairs $216 $262 37 2 M

170 Furniture $113 $692 11 14 M

171 Used Car $109 $540 37 1 M

172 New Car $0 $470 13 0 F

173 New Car $0 $192 7 2 M

174 New Car $8,176 $12,230 7 5 M

175 Repairs $0 $772 25 19 M

176 Furniture $468 $14,186 22 24 M

177 Used Car $7,885 $6,330 16 14 M


179 New Car $0 $886 22 96 M

180 Business $0 $750 37 2 M



183 Business $0 $406 6 35 M

184 Furniture $0 $461 13 48 F

185 Furniture $0 $340 19 4 M


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188 Furniture $0 $506 25 3 F

189 Used Car $0 $14,717 28 7 M

190 Business $172 $0 25 36 M

191 New Car $644 $1,571 19 1 F

192 New Car $0 $0 25 19 F193 Furniture $617 $411 31 3 M

194 New Car $0 $544 25 0 F


196 Furniture $0 $835 19 42 F


198 Business $0 $5,180 22 4 M


200 New Car $0 $821 48 5 F

201 Education $522 $385 10 66 M

202 New Car $585 $2,223 16 0 M

203 New Car $5,588 $0 22 10 F

204 New Car $0 $605 37 20 F

205 Furniture $352 $7,525 13 4 F


207 Business $2,715 $1,435 49 14 M

208 Other $560 $887 25 20 M


210 New Car $305 $4,553 7 2 F


212 New Car $0 $771 25 0 M

213 Furniture $0 $463 11 13 M214 Business $8,948 $110 31 90 M

215 Used Car $0 $10,099 16 108 M

216 Used Car $0 $13,428 7 0 F



219 Education $0 $3,105 16 19 F


221 Large Appliance $0 $1,238 13 0 F

222 Education $0 $238 13 2 F

223 Furniture $0 $127 31 35 F

224 Business $663 $0 19 57 M

225 New Car $624 $785 37 9 F

226 Repairs $0 $718 19 0 F

227 Furniture $0 $493 13 21 M


229 New Car $0 $9,125 13 24 F


231 Business $498 $598 37 14 M

232 New Car $0 $374 10 19 M


7/74


234 Used Car $1,336 $0 37 11 M

235 New Car $0 $508 13 3 M


237 Furniture $0 $636 22 41 F

238 New Car $2,641 $0 13 71 F

239 Used Car $0 $1,519 40 74 M240 Business $0 $922 19 29 M

241 Furniture $0 $180 5 2 F

242 Used Car $0 $701 22 108 M



245 Business $0 $800 49 2 F

246 Furniture $0 $736 13 6 F



249 New Car $18,408 $212 13 9 F

250 New Car $497 $888 16 3 F

251 Used Car $0 $999 25 0 M


253 Business $986 $578 28 1 F

254 Education $8,122 $136 22 4 M

255 Furniture $0 $734 37 111 M

256 Business $778 $861 49 21 M

257 Other $645 $855 25 17 M

258 Furniture $0 $4,486 10 3 F

259 New Car $682 $2,017 37 85 M

260 New Car $19,812 $0 25 37 M261 Business $0 $500 25 1 M

262 Used Car $0 $859 31 89 M

263 Business $859 $3,305 25 26 M


265 New Car $0 $9,016 49 22 M

266 New Car $0 $11,587 22 46 F

267 Furniture $0 $8,944 25 66 M

268 Repairs $0 $807 25 75 M



271 Furniture $0 $347 16 5 F

272 Furniture $0 $836 16 4 M

273 Furniture $0 $142 7 53 F

274 Furniture $0 $169 19 6 M

275 Other $852 $3,613 61 83 F

276 Education $0 $403 7 5 F


278 New Car $425 $0 19 7 F

279 Business $0 $11,481 25 18 M


8/74

280 Business $0 $3,285 7 21 M

281 Education $0 $164 13 65 F

282 New Car $11,072 $891 61 17 M

283 Used Car $0 $0 37 49 M

284 Used Car $219 $841 43 0 M

285 New Car $8,060 $607 19 71 F

286 New Car $0 $486 12 22 M287 New Car $0 $108 25 52 M


289 New Car $0 $113 25 31 F

290 New Car $1,613 $0 25 118 M

291 Furniture $757 $208 25 36 M

292 Retraining $0 $603 13 35 M

293 New Car $0 $343 19 22 F

294 Education $977 $463 10 61 F

295 Education $197 $0 37 17 M

296 Furniture $0 $299 19 11 M

297 New Car $0 $490 13 15 F


299 Business $0 $859 19 23 M

300 New Car $0 $750 13 14 M


302 New Car $296 $591 37 103 M

303 Furniture $0 $13,970 13 24 F

304 New Car $0 $857 11 34 M

305 Furniture $0 $5,857 19 20 M


307 Small Appliance $0 $726 19 7 F308 Furniture $8,636 $214 11 3 F

309 New Car $0 $207 13 119 M

310 New Car $0 $713 13 29 M

311 New Car $19,766 $2,141 11 54 F

312 New Car $0 $483 19 90 F

313 New Car $0 $127 7 13 M

314 Furniture $0 $367 37 22 M


316 Furniture $4,089 $0 7 14 M

317 New Car $0 $102 7 0 F

318 Repairs $271 $759 19 0 F

319 New Car $949 $0 49 36 F



322 New Car $0 $693 19 28 M

323 Used Car $0 $973 49 81 F

324 New Car $0 $648 15 57 M

325 Other $0 $523 37 0 M

326 Used Car $271 $7,090 25 2 F


9/74


328 Used Car $0 $904 49 119 M

329 New Car $0 $541 19 13 M

330 Furniture $0 $154 37 2 F

331 New Car $4,802 $0 37 12 M

332 Business $177 $0 49 9 M

333 Small Appliance $0 $337 25 107 M334 New Car $0 $716 19 33 M

335 Education $996 $837 49 83 M

336 Education $705 $0 25 24 F

337 Furniture $0 $7,710 25 114 M

338 New Car $0 $531 13 5 M


340 Furniture $0 $941 13 111 M

341 Furniture $759 $596 10 18 F

342 Furniture $0 $987 37 101 M


344 Business $257 $460 49 75 F






350 New Car $382 $883 31 20 F

351 Furniture $0 $12,721 37 31 F

352 Education $842 $0 37 9 M

353 Repairs $3,111 $0 13 27 F

354 Small Appliance $0 $302 10 30 M355 Furniture $0 $538 25 59 M



358 Repairs $0 $2,688 10 89 M



361 New Car $332 $214 25 2 M


363 New Car $0 $272 7 90 M

364 Business $929 $124 9 1 M


366 Used Car $0 $612 49 32 M

367 New Car $0 $862 49 62 M

368 Furniture $0 $146 25 46 M

369 New Car $0 $14,190 37 92 M

370 Used Car $0 $396 49 73 M


372 Used Car $646 $0 25 9 M

373 New Car $538 $344 13 40 M


10/74

374 Furniture $0 $204 31 5 M


376 Furniture $0 $435 19 16 F


378 New Car $135 $0 37 7 M

379 Used Car $2,472 $0 37 41 M

380 New Car $0 $412 25 22 M381 New Car $10,417 $19,811 13 27 M



384 Furniture $0 $3,369 25 17 M

385 Furniture $642 $0 13 65 F



388 Business $898 $177 22 105 F

389 New Car $478 $4,071 10 40 M

390 New Car $315 $466 13 3 M

391 New Car $122 $460 37 109 M

392 Furniture $0 $991 7 3 F


394 Education $0 $497 41 24 M

395 Business $670 $4,014 31 21 F

396 Business $444 $921 28 51 F

397 New Car $3,880 $0 23 37 F

398 Used Car $819 $0 13 23 M

399 Used Car $0 $607 37 17 M

400 Large Appliance $0 $15,800 16 40 M

401 Furniture $0 $369 7 23 M402 Business $0 $4,973 25 17 M

403 Furniture $0 $0 40 30 M

404 New Car $0 $761 25 92 M

405 Education $0 $471 7 52 F

406 Used Car $0 $674 37 69 M

407 New Car $0 $547 13 40 M

408 Furniture $161 $524 13 106 M

409 Furniture $0 $815 19 13 M

410 Used Car $0 $0 11 4 F

411 New Car $789 $989 31 0 M


413 Furniture $0 $957 19 11 F

414 New Car $0 $770 37 3 F

415 Furniture $983 $950 13 5 F

416 Used Car $0 $160 13 7 M

417 Used Car $0 $276 25 91 M

418 Education $798 $137 25 25 F

419 New Car $0 $579 22 70 M

420 New Car $193 $2,684 13 5 F


11/74


422 Furniture $0 $0 31 53 M

423 New Car $0 $0 25 103 F

424 New Car $0 $712 16 6 F

425 New Car $0 $912 7 39 M

New DataEducation $600 $3,500 30 45 M

Business $500 $800 15 20 f

New Car $250 $250 15 48 M

Furniture $101 $3,871 10 16 F

Small Appliance $300 $400 10 5 m

Business $790 $3,000 8 24 M

Education $680 $600 50 18 f

Retraining $644 $2,000 20 60 M

Small Appliance $100 $8,000 12 90 F

Repairs $0 $900 25 4 m


12/74

SAMPLE (Individual Answers M

Marital Status Age Housing Years Job Credit Risk 370

Single 23 Own 3 Unskilled Low 117

Divorced 32 Own 1 Skilled High 312

Single 38 Own 4 Management High 316

Single 36 Own 2 Unskilled High 178Single 31 Rent 3 Skilled Low 219

Married 25 Own 1 Skilled Low 376

Married 26 Own 3 Unskilled Low 150


Single 25 Own 2 Skilled High 141


Single 32 Rent 2 Management High 3

Single 34 Rent 2 Unskilled Low 173

Married 26 Own 1 Skilled Low 331

Single 44 Own 1 Skilled High 230


Divorced 39 Own 4 Management Low 54


Single 31 Own 2 Skilled Low 128

Single 47 Own 4 Skilled Low 298

Divorced 23 Rent 2 Skilled High

Divorced 22 Own 4 Skilled High


Married 19 Own 4 Skilled High

Divorced 27 Own 2 Management High

Single 39 Rent 2 Unskilled LowSingle 26 Own 3 Skilled Low

Single 50 Other 4 Skilled High

Single 34 Other 1 Skilled Low

Single 23 Rent 4 Skilled Low

Single 23 Own 2 Skilled Low



Divorced 28 Own 2 Skilled Low



Single 41 Own 1 Unskilled Low


Divorced 43 Own 2 Unskilled Low


Single 34 Own 3 Skilled High

Single 39 Other 4 Unemployed Low





13/74


Married 29 Rent 2 Skilled Low


Single 42 Rent 4 Skilled High


Married 38 Own 4 Skilled Low

Married 21 Own 1 Skilled HighDivorced 32 Rent 4 Unskilled Low



Single 37 Own 3 Management Low

Single 39 Own 4 Management High


Single 27 Rent 3 Unskilled Low



Single 44 Own 2 Unskilled High











Single 36 Own 4 Unskilled LowSingle 25 Own 4 Skilled Low




Divorced 25 Own 1 Unemployed High


Single 64 Own 4 Unemployed Low




Divorced 22 Own 2 Unskilled High






Divorced 49 Other 4 Skilled High


Divorced 40 Rent 4 Unskilled Low


14/74


Married 21 Own 1 Unskilled Low





Divorced 23 Own 2 Unskilled HighDivorced 21 Own 2 Skilled High







Single 39 Rent 4 Unskilled High


Divorced 19 Rent 4 Skilled Low






Single 31 Other 2 Management Low



Divorced 56 Rent 4 Management Low


Single 53 Own 4 Skilled HighDivorced 23 Own 4 Skilled High




Single 24 Own 1 Unemployed High






Single 56 Rent 4 Unskilled Low








Married 24 Rent 2 Skilled High


15/74





Single 52 Other 4 Management High


Divorced 26 Own 2 Skilled LowDivorced 33 Own 1 Unskilled High














Married 46 Own 3 Unskilled High



Divorced 60 Rent 2 Unskilled High



Divorced 22 Own 1 Skilled LowSingle 29 Own 2 Management Low




Married 27 Rent 4 Management High

Divorced 37 Own 2 Unemployed Low


Married 26 Own 2 Unemployed Low













16/74







Divorced 24 Rent 4 Skilled HighMarried 21 Own 1 Skilled Low

Divorced 28 Rent 4 Unemployed High



















Single 24 Rent 2 Unskilled HighSingle 65 Own 4 Management High


Divorced 22 Rent 2 Unemployed Low










Divorced 54 Other 4 Unemployed High








17/74






Divorced 51 Other 4 Management Low

Single 44 Own 2 Management LowSingle 33 Own 1 Skilled Low










Divorced 25 Rent 1 Unemployed High










Single 36 Own 2 Unskilled HighSingle 26 Own 2 Skilled High


Single 35 Rent 4 Management Low



Divorced 30 Own 2 Management Low









Divorced 59 Other 4 Management High






18/74


Divorced 56 Other 4 Unskilled Low





Single 35 Rent 2 Skilled LowSingle 46 Own 4 Unskilled High




















Divorced 24 Rent 4 Skilled HighDivorced 22 Own 2 Skilled Low



Divorced 47 Other 4 Unskilled High






Divorced 53 Own 4 Unemployed Low





Single 31 Other 4 Unskilled High






19/74







Single 35 Own 1 Management LowSingle 30 Own 2 Skilled High


















Single 34 Other 4 Unskilled Low


Single 21 Own 2 Skilled HighSingle 38 Rent 2 Management High

















Divorced 47 Other 4 Skilled Low



20/74







Single 52 Other 4 Skilled HighMarried 27 Own 2 Skilled High















Divorced 41 Other 4 Management High





Single 35 Own 2 Unskilled LowSingle 26 Own 3 Unskilled Low



Divorced 34 Other 4 Skilled High






Married 27 Own 2 Management High





Married 40 Rent 4 Skilled Low






21/74






Single 27 Rent 3 Skilled

Married 26 Rent 1 Unskilled

Single 25 Own 3 Skilled


Divorced 28 Own 2 Skilled

Single 38 Rent 7 Unskilled

Married 37 Other 6 Management


Single 33 Rent 9 Management

Divorced 29 Own 3 Management


22/74

ay Vary)

Total Mone Std Dev

$739 4,821.31$

$1,230

$389

$985$5,717

$2,827

$229

$533

$7,002

$966

$989

$3,305

$900

$821

$624

$129

$1,384

$1,391

$207

$12,635

$17,545

$3,972

$0

$485

$10,723$386

$0

$2,484

$473

$485

$2,043

$3,565

$407

$17,542

$150

$490

$162

$1,655

$323

$128

$218

$109

$17,124

$1,201

For Problem 6.9


23/74

$6,670

$138

$216

$660

$724

$897

$1,212$4,256

$1,787

$757

$789

$0

$746

$601

$659

$717

$667

$580

$763

$1,366

$552

$14,643

$3,423

$399

$955

$8,357

$0

$1,428$322

$800

$656

$1,088

$10,668

$3,560

$626

$15,328

$904

$1,497

$806$3,281

$759

$680

$104

$1,202

$2,632

$706

$1,257


24/74

$576

$1,177

$716

$710

$5,564

$192

$637$919

$775

$5,831

$369

$644

$797

$9,929

$127

$565

$12,632

$116

$178

$7,752

$14,146

$750

$609

$19,286

$544

$10,853

$374

$409$1,219

$322

$1,412

$12,242

$479

$1,435

$466

$2,472

$2,409

$893

$17,633$0

$717

$8,835

$4,449

$0

$104

$897

$4,731


25/74

$945

$836

$325

$32,542

$803

$11,297

$265$609

$1,851

$391

$500

$509

$270

$457

$260

$3,978

$643

$3,329

$6,345

$922

$909

$775

$979

$948

$3,129

$309

$762

$970$425

$861

$478

$805

$649

$470

$192

$20,406

$772

$14,654

$14,215$18,716

$886

$750

$3,870

$3,273

$406

$461

$340


26/74

$6,490

$1,082

$506

$14,717

$172

$2,215

$0$1,028

$544

$586

$835

$823

$5,180

$408

$821

$907

$2,808

$5,588

$605

$7,877

$3,529

$4,150

$1,447

$1,138

$4,858

$418

$771

$463$9,058

$10,099

$13,428

$208

$552

$3,105

$898

$1,238

$238

$127

$663$1,409

$718

$493

$909

$9,125

$364

$1,096

$374


27/74

$156

$1,336

$508

$956

$636

$2,641

$1,519$922

$180

$701

$296

$1,406

$800

$736

$11,838

$364

$18,620

$1,385

$999

$946

$1,564

$8,258

$734

$1,639

$1,500

$4,486

$2,699

$19,812$500

$859

$4,164

$1,218

$9,016

$11,587

$8,944

$807

$867

$17,599

$347$836

$142

$169

$4,465

$403

$836

$425

$11,481


28/74

$3,285

$164

$11,963

$0

$1,060

$8,667

$486$108

$0

$113

$1,613

$965

$603

$343

$1,440

$197

$299

$490

$6,628

$859

$750

$1,210

$887

$13,970

$857

$5,857

$3,624

$726$8,850

$207

$713

$21,907

$483

$127

$367

$813

$4,089

$102

$1,030$949

$503

$1,734

$693

$973

$648

$523

$7,361


29/74

$596

$904

$541

$154

$4,802

$177

$337$716

$1,833

$705

$7,710

$531

$6,089

$941

$1,355

$987

$651

$717

$955

$798

$8,249

$959

$2,438

$1,265

$12,721

$842

$3,111

$302$538

$2,846

$933

$2,688

$17,366

$425

$546

$242

$272

$1,053

$17,124$612

$862

$146

$14,190

$396

$519

$646

$882


30/74

$204

$148

$435

$914

$135

$2,472

$412$30,228

$1,033

$16,630

$3,369

$642

$707

$1,114

$1,075

$4,549

$781

$582

$991

$17,653

$497

$4,684

$1,365

$3,880

$819

$607

$15,800

$369$4,973

$0

$761

$471

$674

$547

$685

$815

$0

$1,778

$11,171$957

$770

$1,933

$160

$276

$935

$579

$2,877


31/74

$497

$0

$0

$712

$912


32/74

Stratified sampling for this data set can be done based one of several attributes such as :

Loan Purpose

Gender

Marital Status etc.

Loan Type Count Sample SizeBusiness 44 4

Education 23 2

Furniture 85 8

Large Appliance 4 0

New Car 104 10

Other 6 0

Repairs 12 1

Retraining 2 0

Small Appliance 105 10

Used Car 40 4

Grand Total 425 42


33/74

Individual results will vary.

The instructor will look for:

30 stocks chosen and data collected

Computation of mean and std dev of all 30 stocks

Use of Excel's Sampling toolComputation of mean and std dev of 5 randomly chosen stocks

Comparison of sample statistics with population parameters


34/74

n=50

1 2 3 4 5 6 7 8 9 10 11

1 0.30 3.61 9.28 4.05 3.59 0.76 4.96 0.89 5.42 6.20 1.90

2 7.88 8.76 9.16 6.34 2.13 0.43 0.59 3.59 3.14 7.01 8.24

3 6.71 6.99 7.77 3.15 1.01 8.97 4.92 9.22 0.05 0.74 1.05

4 8.49 5.16 1.70 4.14 0.55 5.33 8.23 5.08 1.15 8.23 0.67

5 2.06 7.97 6.55 3.26 6.83 6.91 3.55 0.14 4.26 4.91 5.056 1.78 2.32 4.12 0.29 6.66 9.20 2.70 5.57 1.59 0.28 7.16

7 2.27 1.29 9.47 1.45 4.28 9.48 7.85 0.83 2.72 4.15 4.79

44 2.07 7.07 6.65 1.32 0.57 7.53 4.11 2.22 8.69 8.78 9.38

45 2.10 4.00 2.90 2.26 1.22 2.49 1.50 9.36 6.25 3.62 3.93

46 8.49 0.50 9.84 6.69 3.47 0.39 5.03 8.34 1.40 4.36 0.81

47 8.69 8.94 9.03 5.81 0.63 6.78 3.20 4.17 1.18 3.56 1.57

48 1.31 1.22 5.80 7.45 6.33 3.22 1.89 3.03 7.76 5.30 3.98

49 9.42 1.53 7.07 3.73 2.19 1.62 3.56 8.07 5.50 9.45 6.61

50 3.24 5.43 1.15 3.68 2.30 6.98 8.69 9.09 8.03 5.54 0.81

SAMPLE MEAN 5.55 4.43 5.07 4.53 4.52 5.26 4.99 4.78 5.04 5.12 4.65

Standard Error of the mean

For n=50 0.41

For n=500 0.13


35/74

12 13 14 15 16 17 18 19 20 21 22 23 24

2.17 9.58 6.72 0.17 1.38 9.53 5.23 6.19 8.64 1.71 7.02 5.37 9.11

9.64 4.35 5.99 1.32 6.93 3.44 4.37 3.64 4.35 7.56 4.23 3.32 9.61

2.27 9.14 0.95 1.34 8.52 9.50 1.31 9.66 4.33 2.95 8.63 3.65 7.44

8.84 3.23 2.19 7.43 4.92 9.09 2.90 8.72 5.92 6.18 7.24 1.19 4.90

0.12 8.04 1.04 8.39 2.43 1.64 6.37 0.96 8.08 7.30 3.23 3.64 5.913.05 4.63 0.80 8.58 4.19 2.04 4.92 0.64 4.38 3.43 1.49 8.70 6.88

4.50 6.15 6.79 9.22 0.59 0.48 3.88 4.19 7.44 3.19 0.35 7.82 7.00

1.91 5.31 5.23 0.98 4.74 2.71 9.05 0.37 7.24 3.60 0.25 8.18 0.65

1.10 4.12 9.97 7.24 7.22 8.20 8.73 3.10 7.92 7.11 1.33 0.24 3.02

5.11 7.39 1.64 0.72 7.53 1.35 3.10 5.43 8.94 2.27 9.62 3.68 3.78

0.84 1.81 1.59 2.05 2.80 4.54 1.02 0.52 8.21 2.61 4.04 9.78 5.71

9.71 5.13 2.17 2.81 5.58 8.31 6.76 7.13 6.89 5.92 6.11 2.11 4.22

0.00 4.55 3.51 3.32 5.34 5.53 9.49 9.06 5.79 4.78 8.86 2.84 9.18

4.28 3.07 3.12 6.59 1.64 6.13 0.80 6.08 6.11 2.15 9.53 4.21 4.66

4.45 5.26 4.18 4.85 5.08 4.83 5.07 5.14 5.40 4.77 5.18 4.95 5.17

SAMPLES


36/74

25

1.57

2.45

9.47

1.26

9.266.13

4.52

9.72

8.50

9.78

3.73

3.07

9.47

0.04

5.21 4.94 AVERAGE

0.34 ST DEV


37/74

n=500

1 2 3 4 5 6 7 8 9 10 11

1 0.57 8.55 3.17 3.28 7.00 0.68 9.22 7.54 7.65 6.51 4.25

2 4.17 8.13 3.86 6.25 8.05 7.55 4.09 5.10 7.79 4.56 8.82

3 3.71 6.86 1.57 8.50 8.92 5.83 0.24 7.54 1.26 6.81 4.31

4 5.76 1.83 7.46 1.08 7.47 5.15 0.79 5.10 1.57 9.66 0.83

5 3.86 2.63 6.22 6.60 4.50 1.22 2.26 3.18 0.40 7.51 8.776 9.24 5.17 1.19 3.10 8.24 2.85 6.06 8.82 7.87 0.34 4.26

7 7.80 8.29 9.79 5.45 5.77 4.62 8.57 0.42 3.03 8.02 7.85

8 3.96 7.56 0.24 9.71 0.03 4.22 7.23 3.34 8.84 7.98 7.11

9 9.92 4.71 0.51 8.33 6.94 6.76 9.96 8.67 3.68 1.91 2.28

10 7.83 4.70 9.80 6.52 7.86 1.59 5.49 8.48 0.50 1.42 2.87

11 9.26 9.49 9.64 5.03 1.25 0.75 6.71 3.77 7.86 4.42 9.22

12 9.10 4.29 4.98 6.60 8.11 7.35 4.89 1.73 1.96 6.47 0.15

13 0.61 4.38 6.67 3.39 4.14 8.99 8.59 6.09 3.48 0.19 2.89

14 8.86 4.80 5.79 1.99 4.00 6.75 5.44 3.76 4.96 9.91 3.18

15 7.79 0.33 9.54 2.85 0.84 5.94 0.07 4.48 0.58 0.09 5.62

488 5.36 3.20 6.76 0.88 1.00 7.66 8.30 4.57 6.10 0.76 3.05

489 8.10 3.16 2.30 3.30 5.92 3.62 1.53 6.72 3.58 3.05 7.38

490 5.38 7.29 3.00 3.81 5.82 6.80 6.83 0.93 1.67 8.45 1.82

491 7.29 6.90 7.76 5.10 1.29 9.10 8.53 0.56 1.78 6.53 1.16

492 8.90 4.15 8.07 7.97 6.35 2.89 5.38 5.02 9.59 5.93 0.16

493 5.05 0.51 3.48 6.54 6.35 0.45 1.13 4.44 0.34 4.35 4.76

494 1.43 6.13 8.95 8.48 4.63 0.66 8.02 7.96 2.05 3.24 8.71

495 0.02 1.68 3.73 8.50 0.30 5.03 0.22 2.22 1.37 9.90 6.99

496 0.34 5.25 2.72 7.69 3.59 9.62 6.84 4.74 0.83 2.72 3.01

497 5.02 7.70 2.50 2.03 9.25 2.43 6.60 3.46 8.20 2.74 3.72

498 4.51 3.69 7.01 8.48 2.79 9.51 7.98 9.02 4.59 2.83 5.12499 3.10 2.82 5.04 3.07 3.33 9.05 8.66 5.77 2.84 2.85 4.96

500 1.98 3.15 5.03 9.32 3.27 6.07 3.31 1.05 5.37 7.00 1.54

SAMPLE MEAN 5.07 4.96 5.04 5.15 4.80 5.05 5.02 5.24 5.07 5.11 4.95


38/74

12 13 14 15 16 17 18 19 20 21 22 23 24

7.56 4.48 8.72 9.35 7.47 7.94 2.47 4.60 5.40 3.42 7.24 9.71 2.92

0.24 4.67 6.25 8.98 7.16 2.27 6.66 3.26 2.57 7.22 0.71 7.33 2.90

1.43 9.82 4.58 8.19 5.68 7.05 9.88 0.36 7.66 7.40 4.72 3.78 6.69

2.27 4.24 1.06 2.74 5.29 7.77 6.18 9.92 7.24 8.13 6.46 4.85 5.25

5.42 4.61 3.25 2.92 9.61 9.97 9.88 5.35 3.88 6.95 6.41 2.89 1.262.91 7.62 0.78 6.45 8.01 0.73 6.17 6.54 7.74 5.26 0.37 3.87 6.35

9.11 2.59 6.94 4.86 6.99 1.44 5.14 9.15 7.99 5.09 9.32 5.90 5.82

4.71 8.00 1.65 9.79 4.29 0.67 7.03 1.01 6.25 4.89 3.17 8.91 5.25

6.60 0.55 3.36 9.76 4.70 6.52 8.95 9.57 4.37 3.61 9.00 6.49 9.01

5.50 2.87 1.42 9.45 2.24 4.31 8.47 4.91 3.87 1.88 8.87 2.86 6.93

3.37 4.33 8.91 4.66 8.37 1.25 5.10 7.55 8.76 2.76 2.89 5.97 1.78

4.22 1.36 2.65 3.32 4.73 4.28 7.16 0.32 1.41 3.51 4.85 1.65 2.50

3.06 2.42 5.67 4.04 3.16 2.40 1.95 5.14 4.18 3.89 1.30 3.35 7.73

2.60 0.91 8.63 5.67 4.65 0.31 1.78 8.13 3.39 9.95 2.26 7.32 7.31

9.36 4.62 1.97 7.66 1.08 3.32 2.29 3.75 2.82 4.48 0.38 2.59 3.50

0.13 3.75 3.22 4.10 7.88 9.51 4.01 2.53 5.39 3.06 1.64 5.01 1.05

2.41 9.63 7.09 4.24 8.49 0.79 7.17 7.80 2.71 4.42 4.57 9.43 0.49

3.27 1.08 5.79 8.54 0.70 4.69 1.15 2.10 6.45 2.21 2.26 3.74 8.49

3.24 6.30 2.53 2.62 6.02 9.76 6.86 5.16 2.67 4.39 7.12 8.22 3.20

2.55 0.54 4.98 9.75 6.27 3.88 5.49 4.33 0.93 4.50 0.51 6.73 7.16

8.61 9.61 0.50 6.47 6.86 3.17 9.52 6.39 7.79 3.36 4.96 7.26 8.10

1.87 8.58 0.32 3.17 4.17 6.07 0.10 0.63 0.82 0.84 6.16 7.63 5.28

0.87 9.32 1.93 0.48 0.01 7.94 3.35 8.12 0.07 2.73 2.35 6.38 3.55

9.99 3.34 2.06 9.67 0.23 9.16 3.04 6.91 1.26 7.95 0.75 2.47 5.91

9.28 5.13 0.91 5.92 1.67 3.52 1.42 0.01 4.50 3.79 2.09 0.32 6.40

6.62 3.66 3.00 3.54 1.52 7.82 5.97 2.02 2.28 1.53 2.95 8.47 5.869.66 5.22 6.46 3.16 4.12 6.00 7.31 3.92 3.50 8.42 1.95 3.63 5.22

4.99 2.39 5.07 3.06 4.04 2.03 3.00 7.07 3.53 4.43 7.03 0.04 3.33

4.92 4.89 5.08 4.87 4.94 5.03 4.90 5.20 4.93 4.99 5.10 4.98 4.73

SAMPLES


39/74

25

9.20

4.80

3.28

5.14

0.776.59

9.73

4.53

3.50

8.81

7.73

0.02

7.77

3.34

1.35

9.02

0.52

9.49

0.08

8.10

0.20

8.28

5.52

7.99

0.22

7.005.23

7.09

4.93 5.00 AVERAGE

0.12 ST DEV


40/74

Mean 24.00 mpg

S.D. 1.00 mpg

Sample Size 9

Sample Mean 24.00 mpgSample S.D. 0.33 mpg

P(Sample Mean < 25 ) 99.87%

P(Sample Mean > 25 ) 0.13%

P(Sample Mean < 24.5 ) 93.32%


41/74

Mean 2,000.00 ml

S.D. 20.00 ml

Sample Size 100

Sample Mean 2,000.00 mlSample S.D. 2.00 ml

P(Sample Mean < 1950) 0.000%

only 10% 2,002.56 ml


42/74

Accounting Department Survey Data

Employee Gender

Years of

Service

Years

Undergrad

Study

Graduate

Degree? CPA? Age Group

1 F 17 4 N Y 41-45

2 F 6 2 N N 26-303 M 8 4 Y Y 31-35

4 F 8 4 Y N 31-35

5 M 16 4 Y Y 36-40

6 F 21 1 N Y 51-55

7 M 27 4 N N 51-55

8 F 7 4 Y Y 26-30

9 M 8 4 N N 31-35

10 M 23 2 N Y 41-45

11 F 9 4 Y Y 31-35

12 F 8 2 N N 26-30

13 F 8 4 Y N 26-30

14 M 26 4 N Y 46-50

15 F 9 4 N Y 26-30

16 F 9 2 N N 26-30

17 M 19 2 Y Y 36-40

18 M 5 4 N N 36-40

19 M 19 4 Y N 51-55

20 M 20 4 N N 46-50

21 F 14 4 Y Y 36-40

22 M 31 4 N N 51-55

23 F 10 0 N N 51-5524 F 10 4 N Y 31-35

25 M 26 4 Y Y 46-50

26 M 28 4 N N 51-55

27 F 5 4 N Y 21-25


43/74

Years of

Service

14.7037 Sample Mean grad degree 10

8.1326 Sample S.D. no grad degree 1727 Sample Size Total 27

0.05 Alpha

p grad degree 0.37

2.0555 t-value Alpha 0.05

z = 1.96

17.9209 Upper Limit C.I. 0.5525

11.4865 Lower Limit C.I. 0.1882


44/74

Credit Risk Data

Record No Loan Purpose Checking Savings Total Assets

370 Used Car -$ 396.00$ 396.00$ 3,741.80$

117 Small Appliance -$ 10,853.00$ 10,853.00$ 4,821.31$

312 New Car -$ 483.00$ 483.00$ 20

316 Furniture 4,089.00$ -$ 4,089.00$ 0.10178 Small Appliance -$ 18,716.00$ 18,716.00$

219 Education -$ 3,105.00$ 3,105.00$ 1.6449

376 Furniture -$ 435.00$ 435.00$

150 New Car -$ 509.00$ 509.00$ 5,515.08$

367 New Car -$ 862.00$ 862.00$ 1,968.52$

141 Small Appliance -$ 325.00$ 325.00$ 90%

270 Small Appliance 795.00$ 16,804.00$ 17,599.00$

3 New Car -$ 389.00$ 389.00$ As the level of c

173 New Car -$ 192.00$ 192.00$

331 New Car 4,802.00$ -$ 4,802.00$

230 Small Appliance -$ 364.00$ 364.00$

322 New Car -$ 693.00$ 693.00$

54 New Car 162.00$ 595.00$ 757.00$

2 Furniture -$ 1,230.00$ 1,230.00$

128 Furniture 876.00$ 1,533.00$ 2,409.00$

298 Small Appliance -$ 6,628.00$ 6,628.00$


45/74

3,741.80$ 3,741.80$ Sample Mean 3,741.80$ 3,741.80$ 3,741.80$

4,821.31$ 4,821.31$ Population S.D. 5,626.57$ 5,626.57$ 5,626.57$

20 20 Population Size 20 20 20

0.05 0.01 Alpha 0.10 0.05 0.01

1.9600 2.5758 z-value 1.7291 2.0930 2.8609

5,854.79$ 6,518.75$ Upper Limit C.I. 5,917.29$ 6,375.12$ 7,341.25$

1,628.81$ 964.85$ Lower Limit C.I. 1,566.31$ 1,108.48$ 142.35$

95% 99% 90% 95% 99%

onfidence decreases, the interval becomes narrower.

POPULATION STD DEV KNOWN POPULATION STD DEV UNKNOW


46/74

Sample Mean

Sample S.D.

Sample Size

Alpha

t-value

Upper Limit C.I.

Lower Limit C.I.

N


47/74

Restaurant Sales

Date Day Lunch Sales $Dinner Sales

$

Delivery Sales

$TOTAL $ Lunch Sales $

6-Apr Friday 442.00$ 1,289.00$ 1,242.00$ 2,973.00$ 486.69$

13-Apr Friday 508.00$ 1,178.00$ 1,068.00$ 2,754.00$ 176.89$

20-Apr Friday 467.00$ 1,332.00$ 1,254.00$ 3,053.00$ 2627-Apr Friday 379.00$ 1,409.00$ 1,143.00$ 2,931.00$ 0.05

5-Apr Thursday 403.00$ 805.00$ 276.00$ 1,484.00$

12-Apr Thursday 412.00$ 891.00$ 243.00$ 1,546.00$ 2.0595

19-Apr Thursday 345.00$ 913.00$ 294.00$ 1,552.00$

26-Apr Thursday 426.00$ 940.00$ 350.00$ 1,716.00$ 558.14$

3-Apr Tuesday 289.00$ 646.00$ 321.00$ 1,256.00$ 415.24$

10-Apr Tuesday 307.00$ 579.00$ 328.00$ 1,214.00$

17-Apr Tuesday 298.00$ 572.00$ 365.00$ 1,235.00$ They make mor

24-Apr Tuesday 233.00$ 523.00$ 411.00$ 1,167.00$ They make mor

4-Apr Wednesda 354.00$ 782.00$ 289.00$ 1,425.00$

11-Apr Wednesda 387.00$ 664.00$ 301.00$ 1,352.00$

18-Apr Wednesda 419.00$ 621.00$ 278.00$ 1,318.00$

25-Apr Wednesda 341.00$ 731.00$ 243.00$ 1,315.00$

31-Mar Saturday 542.00$ 1,468.00$ 884.00$ 2,894.00$

7-Apr Saturday 449.00$ 1,652.00$ 782.00$ 2,883.00$

14-Apr Saturday 503.00$ 1,581.00$ 714.00$ 2,798.00$

21-Apr Saturday 622.00$ 1,732.00$ 636.00$ 2,990.00$

28-Apr Saturday 592.00$ 1,856.00$ 601.00$ 3,049.00$

1-Apr Sunday 873.00$ 1,345.00$ 489.00$ 2,707.00$

8-Apr Sunday 697.00$ 1,209.00$ 341.00$ 2,247.00$

15-Apr Sunday 741.00$ 1,137.00$ 326.00$ 2,204.00$22-Apr Sunday 846.00$ 1,324.00$ 319.00$ 2,489.00$

29-Apr Sunday 779.00$ 1,229.00$ 398.00$ 2,406.00$


48/74

Dinner Sales

$

Delivery Sales

$Weekday $ Weekend $

1,092.62$ 534.46$ Sample Mean 1,768.19$ 2,666.70$

395.45$ 328.21$ Sample S.D. 708.05$ 308.72$

26 26 Sample Size 16 100.05 0.05 Alpha 0.05 0.05

2.0595 2.0595 t-value 2.1314 2.2622

1,252.34$ 667.03$ Upper Limit C.I. 2,145.48$ 2,887.54$

932.89$ 401.90$ Lower Limit C.I. 1,390.89$ 2,445.86$

e money for dinner

e money during weekends


49/74

Sample Mean

Sample S.D.

Sample SizeAlpha

t-value

Upper Limit C.I.

Lower Limit C.I.


50/74

600 Sample Size

318 Voting for Candidate in Question

0.05 Alpha

1.96 z-value

53.00% Sample Mean

2.04% Standard Error

56.99% Upper Limit C.I.

49.01% Lower Limit C.I.

Since the lower limit is below 50%, he should not be completely confident of winning.


51/74

200 Sample Size

125 Voting for Candidate in Question

0.05 Alpha

1.96 z-value

62.50% Sample Mean




Since the lower limit is above 50%, he should be 95% confident of winning.


52/74

Consumer Transportation Survey

Vehicle

Driven

Type Satisfacti

on with

vehicle

Gender Age # of

hours per

week in

vehicle

Miles

driven

per week

Number

of

Children

Average

number

of riders

Miles

from

work

Truck Foreign No Male 26 12 580 0 1 15Truck Domestic No Male 18 6 300 0 1 20

Car Domestic No Female 62 5 175 0 2 0

Car Domestic No Male 58 10 600 0 1 35



Car Foreign No Female 19 5 500 0 2 4

Truck Domestic Yes Male 31 10 450 0 1 30

SUV Domestic Yes Male 49 21 1000 0 1 22


SUV Foreign Yes Female 36 4 400 0 1 20



Mini Van Domestic Yes Female 55 8 400 0 2 0

Car Domestic Yes Female 21 4 150 0 1 0


Car Foreign Yes Male 60 5 150 0 1 10




Car Foreign Yes Female 27 6 355 0 2 23

Car Foreign Yes Female 26 5 175 0 1 11Car Domestic Yes Female 22 5 350 0 1 3

SUV Foreign No Female 39 6 280 1 1 17

SUV Domestic No Female 31 15 800 1 1 50




SUV Foreign Yes Male 41 5 350 1 1 20



Mini Van Foreign Yes Female 39 15 1000 1 2 0





Mini Van Domestic No Female 43 10 700 2 3 0

Mini Van Domestic No Male 35 5 350 2 2 0




53/74







Mini Van Foreign Yes Female 28 8 350 3 4 0SUV Domestic Yes Male 41 30 1500 4 3 15




54/74

50 Sample Size 50 Sample Size

35 Number satisfied 27 At least One Child

0.05 Alpha 0.05 Alpha

1.96 z-value 1.96 z-value

70.00% Sample Mean 54.00% Sample Mean

6.48% Standard Error 7.05% Standard Error

82.70% Upper Limit C.I. 67.81% Upper Limit C.I.

57.30% Lower Limit C.I. 40.19% Lower Limit C.I.


55/74

400 Sample Size

72 Market Share

0.05 Alpha

1.96 z-value

18.00% Sample Mean




Since 22% is not within the 95% confidence interval, they cannot conclude that they have a 22% ma


56/74

ket share.


57/74

Colleges and Universities

School Type Median SAT

Amherst Lib Arts 1315 Lib Arts University

Barnard Lib Arts 1220 1,256.64$ 1,269.83$ Sample Mean

Bates Lib Arts 1240 43.67$ 78.20$ Sample S.D.

Bowdoin Lib Arts 1300 25 24 Sample SizeBryn Mawr Lib Arts 1255 0.05 0.05 Alpha

Carleton Lib Arts 1300

Claremont McK Lib Arts 1260 2.0639 2.0687 t-value

Colby Lib Arts 1200

Colgate Lib Arts 1258 1,274.67$ 1,302.85$ Upper Limit C.I.

Davisdson Lib Arts 1230 1,238.61$ 1,236.81$ Lower Limit C.I.

Grinnell Lib Arts 1244

Hamilton Lib Arts 1215 Based on the 95% CIs, liberal arts colleges tend to hav

Haverford Lib Arts 1285

Middlebury Lib Arts 1255

Mount Holyoke Lib Arts 1200

Oberlin Lib Arts 1247

Occidental Lib Arts 1170

Pomona Lib Arts 1320

Smith Lib Arts 1195

Swarthnore Lib Arts 1310

Vassar Lib Arts 1287

Washinton and Lib Arts 1234

Wellesley Lib Arts 1250

Wesleyan (CT) Lib Arts 1290

Williams Lib Arts 1336Berkeley University 1176

Brown University 1281

Cal Tech University 1400

Carnegie Mello University 1225

Columbia University 1268

Cornell University 1280

Duke University 1310

Georgetown University 1278

Harvard University 1370

Johns Hopkins University 1290

MIT University 1357

Northwestern University 1230

Princeton University 1340

Rice University 1327

Stanford University 1370

U Michigan University 1195

U of Chicago University 1300

U of Rochester University 1155


58/74

U Pennsylvania University 1280

U Va University 1218

UCLA University 1142

UNC University 1109

Washington U ( University 1225

Yale University 1350


59/74

e lower median SAT scores.


60/74

Baseball Attendance

0 = San Francisco Giants (1958-1967 seasons)

Year Attendanc1 = Giants plus Oakland A's after A's move to Oakland (1968-1978 seasons)

1958 1273 0

1959 1422 0 SFG Oak As

1960 1795 0 1,499.40 1,646.18 Sample Mean1961 1391 0 171.12 235.81 Sample S.D.

1962 1593 0 10 11 Sample Size

1963 1571 0 0.05 0.05 Alpha

1964 1504 0

1965 1546 0 2.2622 2.2281 t-value

1966 1657 0

1967 1242 0 1,621.81 1,804.60 Upper Limit C.I.

1968 1674 1 1,376.99 1,487.76 Lower Limit C.I.

1969 1652 1

1970 1519 1 Attendance appears to have increased

1971 2021 1

1972 1569 1

1973 1835 1

1974 1366 1

1975 1601 1

1976 1408 1

1977 1196 1

1978 2267 1


61/74

18-34 35+

71.86$ 61.53$ Sample Mean

70.90$ 45.29$ Sample S.D.

297 736 Sample Size

0.05 0.05 Alpha

1.9680 1.9632 t-value

79.96$ 64.81$ Upper Limit C.I.

63.76$ 58.25$ Lower Limit C.I.

The 18-34 group appears to spend more.


62/74

Year 1 Year 2 Year 1 Year 2

8.05 7.84 Sample Mean 382 382

1.39 1.34 Sample S.D. 7 4

382 382 Sample Size 0.05 0.05

0.05 0.05 Alpha1.96 1.96

1.9662 1.9662 t-value

0.02 0.01

8.19 7.97 Upper Limit C.I. 0.01 0.01

7.91 7.71 Lower Limit C.I.

0.03 0.02

0.00 0.00

Call Times have reduced and the back injury proportions have decreased in Year 2.

Call Time (hrs) Back Injury Proportion


63/74

Sample Size

Number

Alpha

z-value

Sample Proportion

Standard Error

Upper Limit C.I.

Lower Limit C.I.


64/74

Consumer Transportation Survey

Vehicle

Driven

Type Satisfacti

on with

vehicle

Gender Age # of

hours per

week in

vehicle

Miles

driven

per week

Number

of

Children

Average

number

of riders

Miles

from

work

Truck Foreign No Male 26 12 580 0 1 15Truck Domestic No Male 18 6 300 0 1 20




















Car Foreign Yes Female 26 5 175 0 1 11Car Domestic Yes Female 22 5 350 0 1 3

SUV Foreign No Female 39 6 280 1 1 17













Mini Van Domestic No Female 43 10 700 2 3 0

Mini Van Domestic No Male 35 5 350 2 2 0




65/74







Mini Van Foreign Yes Female 28 8 350 3 4 0SUV Domestic Yes Male 41 30 1500 4 3 15




66/74

# of hours

per week

in vehicle

Miles

driven per

week

# of hours

per week

in vehicle

Miles

driven per

week

8.16 502.10 Sample Mean 8.16 502.105.16 292.16 Sample S.D. 5.16 292.16

50 50 Sample Size 50 50

0.05 0.05 Alpha 0.01 0.01

2.0096 2.0096 t-value 2.6800 2.6800

20.01 1,172.26 Upper Limit P.I. 23.96 1,395.82

(3.69) (168.06) Lower Limit P.I. (7.64) (391.62)

95% 99%


67/74

Restaurant Sales

Date Day Lunch Sales $Dinner Sales

$

Delivery Sales

$TOTAL $ Lunch Sales $

6-Apr Friday 442.00$ 1,289.00$ 1,242.00$ 2,973.00$ 486.69$

13-Apr Friday 508.00$ 1,178.00$ 1,068.00$ 2,754.00$ 176.89$

20-Apr Friday 467.00$ 1,332.00$ 1,254.00$ 3,053.00$ 2627-Apr Friday 379.00$ 1,409.00$ 1,143.00$ 2,931.00$ 0.05

5-Apr Thursday 403.00$ 805.00$ 276.00$ 1,484.00$

12-Apr Thursday 412.00$ 891.00$ 243.00$ 1,546.00$ 2.0595

19-Apr Thursday 345.00$ 913.00$ 294.00$ 1,552.00$

26-Apr Thursday 426.00$ 940.00$ 350.00$ 1,716.00$ 922.46$

3-Apr Tuesday 289.00$ 646.00$ 321.00$ 1,256.00$ 50.92$

10-Apr Tuesday 307.00$ 579.00$ 328.00$ 1,214.00$

17-Apr Tuesday 298.00$ 572.00$ 365.00$ 1,235.00$

24-Apr Tuesday 233.00$ 523.00$ 411.00$ 1,167.00$

4-Apr Wednesda 354.00$ 782.00$ 289.00$ 1,425.00$

11-Apr Wednesda 387.00$ 664.00$ 301.00$ 1,352.00$

18-Apr Wednesda 419.00$ 621.00$ 278.00$ 1,318.00$

25-Apr Wednesda 341.00$ 731.00$ 243.00$ 1,315.00$

31-Mar Saturday 542.00$ 1,468.00$ 884.00$ 2,894.00$

7-Apr Saturday 449.00$ 1,652.00$ 782.00$ 2,883.00$

14-Apr Saturday 503.00$ 1,581.00$ 714.00$ 2,798.00$

21-Apr Saturday 622.00$ 1,732.00$ 636.00$ 2,990.00$

28-Apr Saturday 592.00$ 1,856.00$ 601.00$ 3,049.00$

1-Apr Sunday 873.00$ 1,345.00$ 489.00$ 2,707.00$

8-Apr Sunday 697.00$ 1,209.00$ 341.00$ 2,247.00$

15-Apr Sunday 741.00$ 1,137.00$ 326.00$ 2,204.00$22-Apr Sunday 846.00$ 1,324.00$ 319.00$ 2,489.00$

29-Apr Sunday 779.00$ 1,229.00$ 398.00$ 2,406.00$


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Dinner Sales

$

Delivery Sales

$Weekend $

1,092.62$ 534.46$ Sample Mean 2,666.70$ Sample Mean

395.45$ 328.21$ Sample S.D. 308.72$ Sample S.D.

26 26 Sample Size 10 Sample Size0.05 0.05 Alpha 0.05 Alpha

2.0595 2.0595 t-value 2.2622 t-value

2,066.80$ 1,342.98$ Upper Limit P.I. 3,585.92$ Upper Limit P.I.

118.43$ (274.06)$ Lower Limit P.I. 1,747.48$ Lower Limit P.I.


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Credit Approval Decisions

Homeowner Credit Score

Revolving

Balance Credit Score

Revolving

Balance

N 620 22,800$ 659.48 14,967.41$

N 591 16,500$ 89.76 9,458.15$

N 660 9,200$ 27 27

N 763 11,200$ 0.05 0.05

N 695 20,300$

N 701 11,700$ 2.0555 2.0555

N 507 2,000$

N 677 7,600$ 694.99 18,708.93$

N 485 1,000$ 623.97 11,225.89$

N 582 8,500$

N 703 10,000$

N 585 31,000$

N 620 16,200$

N 774 6,100$ 27 27N 802 10,500$ 0.05 0.05

N 536 27,000$

N 760 11,200$ 2.0555 2.0555

N 567 2,200$

N 600 12,050$ 879.49 38,150.44$

N 702 11,700$ 439.47 (8,215.63)$

N 636 29,100$

N 509 2,000$ Credit scores are lower on aver

N 733 13,000$ Revolving credit for non-homeo

Y 725 11,320$

Y 573 7,200$

Y 677 20,000$

Y 625 12,800$

Y 527 5,700$

Y 795 9,000$

Y 733 35,200$

Y 700 22,000$

Y 500 12,500$

Y 565 7,700$

Y 620 37,400$

Y 774 6,100$Y 802 10,500$

Y 640 17,300$

Y 523 27,000$

Y 811 13,400$

Y 555 2,500$

Y 617 8,400$

Y 642 16,000$

Y 688 3,300$

Homeowners

PREDICTI


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Y 649 7,500$

Y 635 29,100$

Y 699 12,800$

Y 695 9,700$

Y 640 17,300$

Y 801 13,400$

Y 595 29,000$


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Credit Score

Revolving

Balance

Sample Mean 643.83 12,732.61$

Sample S.D. 91.60 8,499.99$

Sample Size 23 23

Alpha 0.05 0.05

t-value 2.0739 2.0739

Upper Limit C.I. 683.44 16,408.28$

Lower Limit C.I. 604.21 9,056.94$

Sample Size 23 23Alpha 0.05 0.05

t-value 2.0739 2.0739

Upper Limit P.I. 873.41 34,036.19$

Lower Limit P.I. 414.25 (8,570.97)$

ge for non-homeowners but with a higher standard deviation

wners is also lower on average, but with a lower standard deviation.

Non-Homeowners

N INTERVAL CALCULATIONS


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Using Example 6.14

alpha 0.05

z-value 1.96

Standard Deviation 5 gallons

Desired Sampling Error 1 gallons

n is at least 97.00


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Using Example 6.15

alpha 0.05

z-value 1.96

Value of pi 0.5

Difference no more than 3%

n is at least 1,068.00

Ch6 Evans BA1e

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Transcript of Ch6 Evans BA1e