FAA Airline Project

66
By: Amanda Camp, Annie Kang, and Nick Lal OFFICE OF AVIATION CONSUMER PROTECTION: FAA DELAY DATA ANALYSIS

Transcript of FAA Airline Project

By: Amanda

Camp, Annie

Kang, and

Nick Lal

OFFICE OF AVIATION

CONSUMER

PROTECTION: FAA

DELAY DATA

ANALYSIS

About 20% of the total fl ights throughout the country are delayed

There are five possible causes for arrival delays at an airport: air carrier issues, inclement weather, issues due to the National Aviation System, security issues, and late arriving aircrafts.

The LEADING cause of arrival delays is due to air carriers, and the least likely cause is security.

WHAT ARE THE LEADING CAUSES OF

ARRIVAL DELAYS IN THE U.S.?

American Flights in 2013

Total Flights: 5852743

% of Flights..:

Total Delayed Flights: 1124319 19%

Total Flights On-Time: 4634155 79%

Total Flights Cancelled: 81265 1%

Total Flights Diverted: 13004 0%

ON AVERAGE, AROUND 80 ARRIVAL

FLIGHTS ARE DELAYED TO EACH

AIRPORT BY 15 MINUTES OR MORE EACH

MONTH

Mean 77.02397753

Median 25

Mode 6

Standard Deviation 198.0042217

Range 5268

Minimum 0

Maximum 5268

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

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Arrivals Delayed by 15 Minutes

Frequency

Cumulative %

THE GREATEST NUMBER OF FLIGHTS ARE

DELAYED DUE TO PROBLEMS WITHIN THE

CONTROL OF THE AIR CARRIER

% of Delays Due to Carriers

Mean 36%

Median 34%

% Delays Due To Weather

Mean 3%

Median 1%

% Delays Due To National Airline Security

Mean 28%

Median 25%

% Delays Due To Security

Mean 0%

Median 0%

% Delays Due To Late Aircraft

Mean 32%

Median 32%

CARRIER DELAYS ALSO CONSTITUTE THE

GREATEST AMOUNT OF TIME DELAYED

% of Time Delayed Due to Carrier

Mean 37%

Median 35%

% of Time Delayed Due to Weather

Mean 4%

Median 1%

% of Time Delayed Due to NAS

Mean 22%

Median 18%

% of Time Delayed Due to Security

Mean 0%

Median 0%

% of Time Delayed Due to Late Aircraft

Mean 36%

Median 36%

CONTRARY TO MEDIA PORTRAYAL, SECURITY

ISSUES ARE ACTUALLY THE LEAST LIKELY

CAUSE OF AN AIRPORT DELAY

% of Delays Due to Carriers

Mean 36%

Median 34%

% Delays Due To Weather

Mean 3%

Median 1%

% Delays Due To National Airline Security

Mean 28%

Median 25%

% Delays Due To Security

Mean 0%

Median 0%

% Delays Due To Late Aircraft

Mean 32%

Median 32%

% of Time Delayed Due to Carrier

Mean 37%

Median 35%

% of Time Delayed Due to Late Aircraft

Mean 36%

Median 36%

% of Time Delayed Due to NAS

Mean 22%

Median 18%

% of Time Delayed Due to Weather

Mean 4%

Median 1%

% of Time Delayed Due to Security

Mean 0%

Median 0%

De

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asin

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Perc

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BECAUSE CARRIER DELAYS HAVE THE

LOWEST VARIABILITY, AIR CARRIER

DELAYS CAN BE EXPECTED TO REMAIN A

LEADING CAUSE FOR ARRIVAL DELAYS

261% 258% 204% 301% 307% 404% 293% 367% 415% 287% 259% 347% 363% 550% 304%

Arrival

flights

Arrival

Delay

Carrier

Count

Weather

Count

NAS

Count

Security

Count

Late Aircraft

Count

Arrivals

cancelled

Arrivals

diverted

Arrival

delay

Carrier

delay

Weather

delay

NAS

delay

Security

delay

Late aircraft

delay

The Coefficient of Variation

Summary

Statistics

and

Histogram

s

ANNEX

ARRIVAL FLIGHTS: TOTAL

Arrival Flights

Mean 397.9292222

Standard Error 8.55599391

Median 125

Mode 31

Standard Deviation 1037.641367

Sample Variance 1076699.607

Kurtosis 85.96928549

Skewness 7.588277263

Range 18776

Minimum 1

Maximum 18777

Sum 5852743

Count 14708

Bins Frequency Cumulative %

75 4568 31.06%

150 3629 55.73%

225 1880 68.51%

300 1017 75.43%

375 589 79.43%

450 552 83.19%

525 392 85.85%

600 345 88.20%

675 191 89.50%

750 136 90.42%

825 124 91.26%

900 107 91.99%

975 79 92.53%

1500 349 94.90%

2000 166 96.03%

More 584 100.00%

Summary Statistics Histogram Data

ARRIVAL FLIGHTS: TOTAL

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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75 150 225 300 375 450 525 600 675 750 825 900 975 1500 2000 More

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Total Arrivals

Frequency

Cumulative %

ARRIVAL FLIGHTS: DELAYED

Summary Statistics Histogram Data

Bins Frequency Cumulative %

20 6620 45.01%

40 2918 64.85%

60 1476 74.89%

80 858 80.72%

100 557 84.51%

200 1215 92.77%

300 330 95.02%

400 182 96.25%

500 119 97.06%

1000 277 98.95%

2000 135 99.86%

3000 16 99.97%

4000 2 99.99%

5000 1 99.99%

More 1 100.00%

Arrival Delay 15+ more

Mean 77.02397753

Standard Error 1.638862983

Median 25

Mode 6

Standard Deviation 198.0042217

Sample Variance 39205.6718

Skewness 7.774677335

Range 5268

Minimum 0

Maximum 5268

Sum 1124319

Count 14597

ARRIVAL FLIGHTS: DELAYED

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

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Bins

Arrivals Delayed by 15 Minutes

Frequency

Cumulative %

ARRIVAL FLIGHTS: DIVERTED

Bins Frequency Cumulative %

0 10390 70.64%

1 2465 87.40%

2 764 92.60%

3 324 94.80%

4 181 96.03%

5 134 96.94%

6 83 97.50%

7 55 97.88%

8 47 98.20%

9 44 98.50%

10 25 98.67%

More 196 100.00%

Summary Statistics Histogram Data

Arrivals Diverted

Mean 0.884144683

Standard Error 0.030261682

Median 0

Mode 0

Standard Deviation 3.670032147

Sample Variance 13.46913596

Skewness 15.67436129

Range 151

Minimum 0

Maximum 151

Sum 13004

Count 14708

ARRIVAL FLIGHTS: DIVERTED

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

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Arrivals Diverted

Frequency

Cumulative %

ARRIVAL FLIGHTS: CANCELLED

Bins Frequency Cumulative %

0 6261 42.57%

2 3608 67.10%

4 1617 78.09%

6 843 83.83%

8 562 87.65%

10 315 89.79%

20 715 94.65%

30 279 96.55%

40 139 97.49%

50 87 98.08%

100 168 99.22%

500 112 99.99%

More 2 100.00%

Summary Statistics Histogram Data

Arrivals Cancelled

Mean 5.525224368

Standard Error 0.167235171

Median 1

Mode 0

Standard Deviation 20.28170351

Sample Variance 411.3474972

Skewness 11.5532291

Range 640

Minimum 0

Maximum 640

Sum 81265

Count 14708

ARRIVAL FLIGHTS: CANCELLED

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Bins

Arrivals Cancelled

Frequency

Cumulative %

CARRIER COUNT

Bins Frequency Cumulative %

5 5056 34.38%

10 2932 54.31%

15 1761 66.28%

20 1122 73.91%

25 800 79.35%

30 551 83.10%

35 396 85.79%

40 290 87.76%

45 265 89.56%

50 196 90.90%

100 777 96.18%

500 552 99.93%

1000 9 99.99%

More 1 100.00%

Summary Statistics Histogram Data

Carrier Count

Mean 21.19381493

Standard Error 0.355918393

Median 8.71

Mode 0

Standard Deviation 43.16455251

Sample Variance 1863.178593

Skewness 6.889807062

Range 1117.2

Minimum 0

Maximum 1117.2

Sum 311718.63

Count 14708

CARRIER COUNT

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Bins

Delays Caused by Carrier

Frequency

Cumulative %

WEATHER COUNT

Bins Frequency Cumulative %

1 9530 64.79%

2 1773 76.85%

3 924 83.13%

4 563 86.96%

5 386 89.58%

6 291 91.56%

7 219 93.05%

8 151 94.08%

9 120 94.89%

10 82 95.45%

20 435 98.41%

30 118 99.21%

40 46 99.52%

50 22 99.67%

100 41 99.95%

More 7 100.00%

Summary Statistics Histogram Data

Weather Count

Mean 2.168992385

Standard Error 0.053754894

Median 0.48

Mode 0

Standard Deviation 6.519207796

Sample Variance 42.50007028

Skewness 11.59905053

Range 210.73

Minimum 0

Maximum 210.73

Sum 31901.54

Count 14708

WEATHER COUNT

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Bins

Delays Caused by Weather

Frequency

Cumulative %

NAS COUNT

Bins Frequency Cumulative %

5 6643 45.17%

10 2701 63.53%

15 1470 73.52%

20 853 79.32%

25 594 83.36%

30 383 85.97%

35 289 87.93%

40 207 89.34%

45 155 90.39%

50 136 91.32%

100 597 95.38%

500 608 99.51%

2000 71 99.99%

More 1 100.00%

Summary Statistics Histogram Data

NAS count

Mean 23.43713693

Standard Error 0.592349667

Median 6

Mode 0

Standard Deviation 71.83812011

Sample Variance 5160.715501

Skewness 9.470748734

Range 2401.79

Minimum 0

Maximum 2401.79

Sum 344713.41

Count 14708

NAS COUNT

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Bins

Delays Caused by the National Aviation System

Frequency

Cumulative %

SECURITY COUNT

Bins Frequency Cumulative %

0 12909 87.77%

0.5 520 91.30%

1 716 96.17%

2 328 98.40%

3 116 99.19%

4 53 99.55%

5 30 99.76%

6 18 99.88%

7 6 99.92%

8 4 99.95%

9 4 99.97%

10 1 99.98%

11 1 99.99%

12 2 100.00%

More 0 100.00%

Summary Statistics Histogram Data

Security Count

Mean 0.139990481

Standard Error 0.004669121

Median 0

Mode 0

Standard Deviation 0.56625481

Sample Variance 0.320644509

Skewness 7.479995736

Range 11.23

Minimum 0

Maximum 11.23

Sum 2058.98

Count 14708

SECURITY COUNT

80.00%

82.00%

84.00%

86.00%

88.00%

90.00%

92.00%

94.00%

96.00%

98.00%

100.00%

102.00%

0

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Delays by Security

Frequency

Cumulative %

LATE AIRCRAFT COUNT

Bins Frequency Cumulative %

0 1200 8.16%

10 7263 57.54%

20 2493 74.49%

30 1051 81.64%

40 639 85.98%

50 400 88.70%

100 825 94.31%

200 403 97.05%

500 316 99.20%

1000 105 99.91%

1500 10 99.98%

More 3 100.00%

Summary Statistics Histogram Data

Late-aircraft Count

Mean 29.50291814

Standard Error 0.713528352

Median 7.47

Mode 0

Standard Deviation 86.53425217

Sample Variance 7488.176799

Skewness 7.657446284

Range 1699.38

Minimum 0

Maximum 1699.38

Sum 433928.92

Count 14708

LATE AIRCRAFT COUNT

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Delays by Late Aircraft

Frequency

Cumulative %

TOTAL MINUTES DELAYED FOR ARRIVALS

Summary Statistics Histogram Data

Arrivals Delay

Mean 4351.645703

Standard Error 103.1497029

Median 1277

Mode 0

Standard Deviation 12509.63943

Sample Variance 156491078.6

Skewness 9.45042789

Range 369537

Minimum 0

Maximum 369537

Sum 64004005

Count 14708

Bins Frequency Cumulative %

500 3865 26.28%

1000 2547 43.60%

1500 1603 54.49%

2000 1174 62.48%

2500 848 68.24%

3000 679 72.86%

3500 472 76.07%

4000 385 78.69%

4500 329 80.92%

5000 247 82.60%

6000 444 85.62%

7000 345 87.97%

8000 231 89.54%

9000 203 90.92%

10000 123 91.75%

25000 726 96.69%

50000 295 98.69%

75000 101 99.38%

100000 34 99.61%

400000 57 100.00%

More 0 100.00%

TOTAL MINUTES DELAYED FOR ARRIVALS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Bins

Total Minutes Delayed by Arrivals

Frequency

Cumulative %

MINUTES DELAYED DUE TO CARRIERS

Summary Statistics Histogram Data

Carrier Delay

Mean 1274.532499

Standard Error 27.24166249

Median 455.5

Mode 0

Standard Deviation 3303.774666

Sample Variance 10914927.04

Skewness 11.07371632

Range 106746

Minimum 0

Maximum 106746

Sum 18745824

Count 14708

Bins Frequency Cumulative %

0 644 4.38%

100 2009 18.04%

200 1701 29.60%

300 1397 39.10%

400 1083 46.46%

500 915 52.69%

1000 2751 71.39%

2000 2126 85.84%

3000 859 91.68%

4000 335 93.96%

5000 189 95.25%

10000 415 98.07%

100000 283 99.99%

More 1 100.00%

MINUTES DELAYED DUE TO CARRIERS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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1000

1500

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Bins

Total Minutes Delayed by Carriers

Frequency

Cumulative %

MINUTES DELAYED DUE TO WEATHER

Summary Statistics Histogram Data

Weather Delay

Mean 175.7867147

Standard Error 5.031176426

Median 22

Mode 0

Standard Deviation 610.1636866

Sample Variance 372299.7245

Skewness 12.39887612

Range 16771

Minimum 0

Maximum 16771

Sum 2585471

Count 14708

Bins Frequency Cumulative %

25 7574 51.50%

50 1172 59.46%

75 883 65.47%

100 662 69.97%

200 1576 80.68%

300 808 86.18%

400 512 89.66%

500 341 91.98%

600 227 93.52%

700 163 94.63%

800 136 95.55%

900 102 96.25%

1000 74 96.75%

10000 468 99.93%

20000 10 100.00%

More 0 100.00%

MINUTES DELAYED DUE TO WEATHER

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Total Minutes Delayed by Weather

Frequency

Cumulative %

MINUTES DELAYED DUE TO NAS

Summary Statistics Histogram Data

NAS Delay

Mean 1069.657125

Standard Error 31.98706205

Median 222

Mode 0

Standard Deviation 3879.280322

Sample Variance 15048815.81

Skewness 11.42397302

Range 137443

Minimum 0

Maximum 137443

Sum 15732517

Count 14708

Bins Frequency Cumulative %

25 1928 13.11%

50 1024 20.07%

75 960 26.60%

100 796 32.01%

200 2286 47.55%

300 1456 57.45%

400 1048 64.58%

500 752 69.69%

600 511 73.16%

700 458 76.28%

800 377 78.84%

900 313 80.97%

1000 249 82.66%

2500 1433 92.41%

5000 502 95.82%

7500 195 97.14%

10000 110 97.89%

25000 231 99.46%

50000 63 99.89%

More 16 100.00%

MINUTES DELAYED DUE TO NAS

0.00%

20.00%

40.00%

60.00%

80.00%

100.00%

120.00%

0

500

1000

1500

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Total Minutes Delayed by NAS

Frequency

Cumulative %

MINUTES DELAYED DUE TO SECURITY

Summary Statistics Histogram Data

Security Delay

Mean 6.448667392

Standard Error 0.29263602

Median 0

Mode 0

Standard Deviation 35.48988504

Sample Variance 1259.53194

Skewness 15.0786857

Range 1482

Minimum 0

Maximum 1482

Sum 94847

Count 14708

Bins Frequency Cumulative %

0 12909 87.77%

0.5 0 87.77%

1 27 87.95%

1.5 0 87.95%

2 41 88.23%

4 61 88.65%

6 66 89.09%

8 81 89.65%

10 72 90.13%

20 401 92.86%

30 294 94.86%

40 145 95.85%

50 133 96.75%

100 230 98.31%

10000 248 100.00%

More 0 100.00%

MINUTES DELAYED DUE TO SECURITY

80.00%

82.00%

84.00%

86.00%

88.00%

90.00%

92.00%

94.00%

96.00%

98.00%

100.00%

0

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Total Minutes Delayed by Security

Frequency

Cumulative %

MINUTES DELAYED DUE TO LATE

AIRCRAFTS

Summary Statistics Histogram Data

Late_Aircraft Delay

Mean 1825.220696

Standard Error 45.69513595

Median 445

Mode 0

Standard Deviation 5541.748142

Sample Variance 30710972.47

Skewness 8.64330444

Range 127300

Minimum 0

Maximum 127300

Sum 26845346

Count 14708

Bins Frequency Cumulative %

25 1834 12.47%

50 567 16.32%

75 469 19.51%

100 462 22.65%

200 1528 33.04%

300 1151 40.87%

400 964 47.42%

500 764 52.62%

600 700 57.38%

700 546 61.09%

800 456 64.19%

900 444 67.21%

1000 365 69.69%

1500 1213 77.94%

2500 1151 85.76%

5000 1062 92.98%

7500 313 95.11%

10000 184 96.36%

100000 530 99.97%

More 5 100.00%

MINUTES DELAYED DUE TO LATE

AIRCRAFTS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

200

400

600

800

1000

1200

1400

1600

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Bins

Total Minuted Delayed by Late Aircraft

Frequency

Cumulative %

PERCENT OF FLIGHTS DELAYED

Summary Statistics Histogram Data

% of arrivals Delayed

Mean 20%

Standard Error 0%

Median 19%

Mode 0%

Standard Deviation 11%

Sample Variance 0.01

Skewness 1.41

Range 100%

Minimum 0%

Maximum 100%

Sum 295502%

Count 1470800%

Bin Frequency Cumulative %

0.1 2313 15.73%

0.2 5837 55.41%

0.3 4272 84.46%

0.4 1729 96.21%

0.5 407 98.98%

0.6 86 99.56%

0.7 24 99.73%

0.8 6 99.77%

0.9 3 99.79%

1 31 100.00%

More 0 100.00%

PERCENT OF FLIGHTS DELAYED

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

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Percent of Total Flights that are Delayed

Frequency

Cumulative %

PERCENT OF FLIGHTS DIVERTED

Summary Statistics Histogram Data

%Total Divert

Mean 1%

Standard Error 0%

Median 0%

Mode 0%

Standard Deviation 3%

Sample Variance 0.000730187

Skewness 14.91432536

Range 100%

Minimum 0%

Maximum 100%

Sum 8750%

Count 1470500%

Bin Frequency Cumulative %

0.01 12737 86.76%

0.02 951 93.24%

0.03 309 95.34%

0.04 267 97.16%

0.05 100 97.84%

0.06 59 98.24%

0.07 51 98.59%

0.08 26 98.77%

0.09 27 98.95%

0.1 23 99.11%

1 131 100.00%

More 0 100.00%

PERCENT OF FLIGHTS DIVERTED

80.00%

82.00%

84.00%

86.00%

88.00%

90.00%

92.00%

94.00%

96.00%

98.00%

100.00%

0

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14000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

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Bin

Percent of Total Flights that are Diverted

Frequency

Cumulative %

PERCENT OF FLIGHTS CANCELLED

Summary Statistics Histogram Data

%Total Cancel

Mean 1%

Standard Error 0%

Median 0%

Mode 0%

Standard Deviation 2%

Sample Variance 0.000553767

Skewness 3.839647135

Range 50%

Minimum 0%

Maximum 50%

Sum 21254%

Count 1470800%

Bin Frequency Cumulative %

0.01 8792 59.78%

0.02 2219 74.86%

0.03 1195 82.99%

0.04 995 89.75%

0.05 520 93.29%

0.06 296 95.30%

0.07 222 96.81%

0.08 148 97.82%

0.09 76 98.33%

0.1 74 98.84%

1 171 100.00%

More 0 100.00%

PERCENT OF FLIGHTS CANCELLED

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

Fre

qu

en

cy

Bin

Percent of Total Flights that are Cancelled

Frequency

Cumulative %

PERCENT OF DELAYS DUE TO CARRIERS

Summary Statistics Histogram Data

% of Delay Due to Carrier

Mean 36%

Standard Error 0%

Median 34%

Mode 0%

Standard Deviation 17%

Sample Variance 0.03

Skewness 0.90

Range 100%

Minimum 0%

Maximum 100%

Sum 518585%

Count 1435300%

Bin Frequency Cumulative %

0.1 639 4.45%

0.2 1496 14.87%

0.3 3176 37.00%

0.4 4060 65.29%

0.5 2662 83.84%

0.6 1197 92.18%

0.7 541 95.95%

0.8 226 97.52%

0.9 114 98.31%

1 242 100.00%

More 0 100.00%

PERCENT OF DELAYS DUE TO CARRIERS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Delays Caused by Carriers

Frequency

Cumulative %

PERCENT OF DELAYS DUE TO WEATHER

Summary Statistics Histogram Data

% Delays Due To Weather

Mean 3%

Standard Error 0%

Median 1%

Mode 0%

Standard Deviation 6%

Sample Variance 0.00

Skewness 4.81

Range 100%

Minimum 0%

Maximum 100%

Sum 48431%

Count 1435300%

Bin Frequency Cumulative %

0.01 6924 48.24%

0.02 1447 58.32%

0.03 1233 66.91%

0.04 978 73.73%

0.05 701 78.61%

0.06 517 82.21%

0.07 429 85.20%

0.08 335 87.54%

0.09 248 89.26%

0.1 251 91.01%

1 1290 100.00%

More 0 100.00%

PERCENT OF DELAYS DUE TO WEATHER

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

1000

2000

3000

4000

5000

6000

7000

8000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

Fre

qu

en

cy

Bin

Percent of Delays Caused by Weather

Frequency

Cumulative %

PERCENT OF DELAYS DUE TO THE

NATIONAL AVIATION SYSTEM

Summary Statistics Histogram Data

%Delays Due to National Airline Security

Mean 28%

Standard Error 0%

Median 25%

Mode 0%

Standard Deviation 18%

Sample Variance 0.03

Skewness 1.05

Range 100%

Minimum 0%

Maximum 100%

Sum 404857%

Count 1435300%

Bin Frequency Cumulative %

0.1 1906 13.28%

0.2 3187 35.48%

0.3 3740 61.54%

0.4 2486 78.86%

0.5 1434 88.85%

0.6 763 94.17%

0.7 399 96.95%

0.8 207 98.39%

0.9 111 99.16%

1 120 100.00%

More 0 100.00%

PERCENT OF DELAYS DUE TO THE

NATIONAL AVIATION SYSTEM

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

4000

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Delays Caused by the National Aviation System

Frequency

Cumulative %

PERCENT OF DELAYS DUE TO SECURITY

Summary Statistics Histogram Data

%Delays Due To Security

Mean 0%

Standard Error 0%

Median 0%

Mode 0%

Standard Deviation 2%

Sample Variance 0.000358375

Skewness 28.26042357

Range 100%

Minimum 0%

Maximum 100%

Sum 3373%

Count 1435300%

Bin Frequency Cumulative %

0.01 13735 95.69%

0.02 248 97.42%

0.03 109 98.18%

0.04 76 98.71%

0.05 32 98.93%

0.06 32 99.16%

0.07 17 99.28%

0.08 20 99.41%

0.09 13 99.51%

0.1 15 99.61%

1 56 100.00%

More 0 100.00%

PERCENT OF DELAYS DUE TO SECURITY

93.00%

94.00%

95.00%

96.00%

97.00%

98.00%

99.00%

100.00%

0

2000

4000

6000

8000

10000

12000

14000

16000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

Fre

qu

en

cy

Bin

Percent of Delays Caused by Security

Frequency

Cumulative %

PERCENT OF DELAYS DUE TO LATE

AIRCRAFTS

Summary Statistics Histogram Data

% Delay Late

Mean 32%

Standard Error 0%

Median 32%

Mode 0%

Standard Deviation 17%

Sample Variance 0.029482445

Skewness 0.290815078

Range 100%

Minimum 0%

Maximum 100%

Sum 460086%

Count 1435300%

Bin Frequency Cumulative %

0.1 1531 10.67%

0.2 1894 23.86%

0.3 2988 44.68%

0.4 3534 69.30%

0.5 2521 86.87%

0.6 1176 95.06%

0.7 468 98.32%

0.8 126 99.20%

0.9 44 99.51%

1 71 100.00%

More 0 100.00%

PERCENT OF DELAYS DUE TO LATE

AIRCRAFTS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

4000

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Delays Caused by Late Aircraft

Frequency

Cumulative %

PERCENT OF DELAY TIME DUE TO

CARRIERS

Summary Statistics Histogram Data

%Time Carrier

Mean 37%

Standard Error 0%

Median 35%

Mode 0%

Standard Deviation 20%

Sample Variance 0.038341367

Skewness 0.770654734

Range 100%

Minimum 0%

Maximum 100%

Sum 534127%

Count 1435300%

Bin Frequency Cumulative %

0.1 860 5.99%

0.2 1578 16.99%

0.3 2975 37.71%

0.4 3465 61.85%

0.5 2426 78.76%

0.6 1370 88.30%

0.7 762 93.61%

0.8 369 96.18%

0.9 249 97.92%

1 299 100.00%

More 0 100.00%

PERCENT OF DELAY TIME DUE TO

CARRIERS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

4000

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Minutes Delayed by Carriers

Frequency

Cumulative %

PERCENT OF DELAY TIME DUE TO

WEATHER

Summary Statistics Histogram Data

%Time Weather

Mean 4%

Standard Error 0%

Median 1%

Mode 0%

Standard Deviation 8%

Sample Variance 0.006406894

Skewness 3.930052475

Range 100%

Minimum 0%

Maximum 100%

Sum 64018%

Count 1435300%

Bin Frequency Cumulative %

0.01 6782 47.25%

0.02 1178 55.46%

0.03 1014 62.52%

0.04 851 68.45%

0.05 663 73.07%

0.06 516 76.67%

0.07 441 79.74%

0.08 365 82.28%

0.09 306 84.41%

0.1 248 86.14%

1 1989 100.00%

More 0 100.00%

PERCENT OF DELAY TIME DUE TO

WEATHER

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

1000

2000

3000

4000

5000

6000

7000

8000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

Fre

qu

en

cy

Bin

Percent of Minutes Delayed Weather

Frequency

Cumulative %

PERCENT OF DELAY TIME DUE TO THE

NATIONAL AVIATION SYSTEM

Summary Statistics Histogram Data

Bin Frequency Cumulative %

0.1 3284 22.88%

0.2 4651 55.28%

0.3 3042 76.48%

0.4 1496 86.90%

0.5 817 92.59%

0.6 444 95.69%

0.7 242 97.37%

0.8 158 98.47%

0.9 85 99.07%

1 134 100.00%

More 0 100.00%

%Time NAS

Mean 22%

Standard Error 0%

Median 18%

Mode 0%

Standard Deviation 18%

Sample Variance 0.030664586

Skewness 1.658969918

Range 100%

Minimum 0%

Maximum 100%

Sum 320851%

Count 1435300%

PERCENT OF DELAY TIME DUE TO THE

NATIONAL AVIATION SYSTEM

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Minutes Delayed by the National Aviation System

Frequency

Cumulative %

PERCENT OF DELAY TIME DUE TO

SECURITY

Summary Statistics Histogram Data

%Time Security

Mean 0%

Standard Error 0%

Median 0%

Mode 0%

Standard Deviation 2%

Sample Variance 0.000486315

Skewness 24.59182084

Range 100%

Minimum 0%

Maximum 100%

Sum 3386%

Count 1435300%

Bin Frequency Cumulative %

0.01 13835 96.39%

0.02 202 97.80%

0.03 85 98.39%

0.04 53 98.76%

0.05 33 98.99%

0.06 28 99.18%

0.07 19 99.32%

0.08 10 99.39%

0.09 13 99.48%

0.1 9 99.54%

1 66 100.00%

More 0 100.00%

PERCENT OF DELAY TIME DUE TO

SECURITY

94.00%

95.00%

96.00%

97.00%

98.00%

99.00%

100.00%

0

2000

4000

6000

8000

10000

12000

14000

16000

0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 1 More

Fre

qu

en

cy

Bin

Percent of Minutes Delayed by Security

Frequency

Cumulative %

PERCENT OF DELAY TIME DUE TO LATE

AIRCRAFTS

Summary Statistics Histogram Data

%Time Late

Mean 36%

Standard Error 0%

Median 36%

Mode 0%

Standard Deviation 19%

Sample Variance 0.037344155

Skewness 0.113840621

Range 100%

Minimum 0%

Maximum 100%

Sum 512919%

Count 1435300%

Bin Frequency Cumulative %

0.1 1611 11.22%

0.2 1438 21.24%

0.3 2258 36.97%

0.4 3004 57.90%

0.5 2795 77.38%

0.6 1862 90.35%

0.7 864 96.37%

0.8 324 98.63%

0.9 109 99.39%

1 88 100.00%

More 0 100.00%

PERCENT OF DELAY TIME DUE TO LATE

AIRCRAFTS

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

0

500

1000

1500

2000

2500

3000

3500

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 More

Fre

qu

en

cy

Bin

Percent of Minutes Delayed by Late Aircraft

Frequency

Cumulative %

ADDITIONAL DATA

Mean 397.9292222

76.4478819

6 21.19381493 2.168992385

23.4371369

3 0.139990481 29.50291814 5.525224368 0.884144683 4351.645703 1274.532499 175.7867147 1069.657125

Median 125 24 8.71 0.48 6 0 7.47 1 0 1277 455.5 22 222

Mode 31 6 0 0 0 0 0 0 0 0 0 0 0

Q1 60 10 3.31 0 2.07 0 2.32 0 0 472 159 0 70

Q3 294 61 20.76 1.88 15.99 0 20.55 4 1 3303 1168 139 657.25

Skewed? 7.588277263

7.79899262

8 6.889807062 11.59905053

9.47074873

4 7.479995736 7.657446284 11.5532291 15.67436129 9.45042789 11.07371632 12.39887612 11.42397302

Min 1 0 0 0 0 0 0 0 0 0 0 0 0

Max 18777 5268 1117.2 210.73 2401.79 11.23 1699.38 640 151 369537 106746 16771 137443

Range 18776 5268 1117.2 210.73 2401.79 11.23 1699.38 640 151 369537 106746 16771 137443

Standard

Dev 1037.641367

197.373909

1 43.16455251 6.519207796

71.8381201

1 0.56625481 86.53425217 20.28170351 3.670032147 12509.63943 3303.774666 610.1636866 3879.280322

CV 2.607602834

2.58181003

9 2.03665799 3.005638858

3.06514060

7 4.044952228 2.933074341 3.670747495 4.150940696 2.874691618 2.592146271 3.471045509 3.626657767

Max z 7048.263079

2010.81878

2 538.1395358 69.38990925

775.935974

4 2.741691099 569.3265454 172.8462054 36.16429776 127034.6189 40688.85644 4781.04169 37603.03608

Min z -0.38253026

-

0.38732516

5

-

0.491000455 -0.332707969

-

0.32624930

7 -0.247221708 -0.340939193 -0.272424077 -0.240909248 -0.3478634 -0.385780699 -0.288097634

-

0.275735971

Minus 2s -1677.353513

-

318.299936

3

-

65.13529009 -10.86942321

-

120.239103

3 -0.992519138 -143.5655862 -35.03818265 -6.45591961 -20667.63315 -5333.016832 -1044.540659

-

6688.903518

Plus 2s 2473.211957

471.195700

2 107.52292 15.20740798

167.113377

2 1.2725001 202.5714225 46.08863139 8.224208977 29370.92456 7882.081831 1396.114088 8828.217769

Minus 3s -2714.99488

-

515.673845

4

-

108.2998426 -17.388631

-

192.077223

4 -1.558773947 -230.0998384 -55.31988616 -10.12595176 -33177.27258 -8636.791498 -1654.704345

-

10568.18384

Plus 3s 3510.853325

668.569609

3 150.6874725 21.72661577

238.951497

3 1.83875491 289.1056747 66.37033489 11.89424112 41880.56399 11185.8565 2006.277775 12707.49809

Arrival

flights

Arrival

del15

Carrier

ct

Weather

ct

NAS

ct

Security

ct

Late

aircraft ct

Arrivals

cancelled

Arrivals

diverted

Arrival

delay

carrier

delay

Weather

delay

NAS

delay

Security

delay

Late aircraft

delay

ADDITIONAL DATA

%Tot Delay %Delay Car

%Delay

Wea %Delay NAS

%Delay

Secu %Delay Late%Tot Cancel%Tot Divert %Time Carri

%Time

Weat %Time NAS %Time Secu%Time Late

20% 36% 3% 28% 0% 32% 1% 1% 37% 4% 22% 0% 36%

19% 34% 1% 25% 0% 32% 0% 0% 35% 1% 18% 0% 36%

0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%

13% 25% 0% 16% 0% 21% 0% 0% 24% 0% 11% 0% 23%

26% 45% 4% 37% 0% 43% 2% 0% 47% 6% 29% 0% 48%

1.41361177

4

0.90369308

5

4.80649872

8

1.05035527

1

28.2604235

7

0.29081507

8

3.83964713

5

14.9143253

6

0.77065473

4

3.93005247

5

1.65896991

8

24.5918208

4

0.11384062

1

0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0%

100% 100% 100% 100% 100% 100% 50% 100% 100% 100% 100% 100% 100%

100% 100% 100% 100% 100% 100% 50% 100% 100% 100% 100% 100% 100%

11% 17% 6% 18% 2% 17% 2% 3% 20% 8% 18% 2% 19%

0.54492735

6

0.48242812

5

1.78941565

8 0.64208514

8.05669475

7 0.53565559

1.62846585

9

4.54129981

2

0.52617713

1

1.79459883

8

0.78335400

7

9.34866613

5

0.54076091

4

1.46641066

5

1.32391228

3

0.53998464

5

1.11812017

1

0.12382873

3

1.26844519

9

0.29816371

6

0.21889101

6

1.19325573

3

0.53237401

6 0.99119593

0.10671480

7

1.18839936

5

-

1.83510698

9 -2.07284764

-

0.55884165

1

-

1.55742585

8

-

0.12412037

8

-

1.86687121

2

-

0.61407489

4

-

0.22020127

3

-

1.90050068

8

-

0.55722759

8

-

1.27656205

4

-

0.10696713

2

-

1.84924607

8

-

0.01805295

4 0.0126977

-

0.08701755

9

-

0.08015638

1

-

0.03551191

3

-

0.02285881

6

-

0.03261394

5

-

0.04809366

1

-

0.01948291

2

-

0.11548393

7

-

0.12668343

8

-

0.04174621

8

-

0.02913264

7

0.41987838

1 0.70991726

0.15450360

1

0.64429968

8 0.04021131

0.66395929

3 0.06151508

0.05999420

4

0.76375515

6

0.20468835

7

0.57376883

2

0.04646401

5

0.74385279

2

-

0.12753578

8 -0.16160719

-

0.14739784

9

-

0.26127039

8

-

0.05444271

8

-

0.19456334

3

-

0.05614620

1

-

0.07511562

7

-

0.21529242

9

-

0.19552701

1

-

0.30179650

5

-

0.06379877

6

-

0.22237900

6

0.52936121

5 0.88422215

0.21488389

1

0.82541370

6

0.05914211

6 0.83566382

0.08504733

6 0.08701617

0.95956467

3 0.28473143 0.7488819

0.06851657

4

0.93709915

1