Week 4 iLab Lecture

B. Heard(These may not be copied, reproduced, or posted in

an online classroom without my permission. Students may download one copy for personal use.)

Week 4 Lab Lecture

• Week 4 iLab– 9 Questions (some requiring multiple answers)– I will show similar problems, but please note these

are not the same values!– Submit in the given Microsoft Word Document to

the Week 4 iLab Dropbox found in the Dropbox area (tabs at top of your course)

Week 4 Lab Lecture

• Number 1– I will be using 1/5, 2/5 and 4/5 (NOT ¼ , ½ and ¾ )

Week 4 Lab Lecture

Week 4 Lab Lecture

Week 4 Lab Lecture

• Now Graph All Three

Week 4 Lab Lecture

Week 4 Lab Lecture

Week 4 Lab Lecture

Week 4 Lab Lecture

• Number 2• Download Data (if you haven’t already)– File >> Open Worksheet– Change Drive to pshop$(\\ilabss)(G:)– Select Math 221 Folder– Select Math221_LabData Minitab– When pop-up shows click “OK” (maybe twice)

Week 4 Lab Lecture

Week 4 Lab Lecture

Week 4 Lab Lecture

Week 4 Lab Lecture

• Number 3

Week 4 Lab Lecture

• Number 3

ETC

Week 4 Lab Lecture

• Number 4

Week 4 Lab Lecture

• For the first one, x ≥ 1, you would add all of the probabilities from 1 through 10 for 2/5 or calculate 1 – P(0)

Week 4 Lab Lecture

• For the second one, x > 1, you would add all of the probabilities from 2 through 10 for 2/5 or calculate 1 – (P(0)+P(1))

Week 4 Lab Lecture

• For the third one, 4<x ≤ 7, you would add all of the probabilities from 5 through 7

Week 4 Lab Lecture

• For the last one, x < 4 OR x ≥ 7, you would add all of the probabilities from 0 through 3 AND all probabilities from 7 through 10 (OR YOU COULD SAY 1 – THOSE NOT INCLUDED)

Week 4 Lab Lecture

• Number 5

Mean = 10 (2/5) = 4 Std Dev = Sq Root (10)(2/5)(3/5) = 1.549

Week 4 Lab Lecture

• Number 6

Mean = 10 (1/5) = 2 Std Dev = Sq Root (10)(1/5)(4/5) = 1.265

Week 4 Lab Lecture

• Number 7

Mean = 10 (4/5) = 8 Std Dev = Sq Root (10)(4/5)(1/5) = 1.265

Week 4 Lab Lecture

• Number 8

USE DEFINITION OF BINOMIAL DISTRIBUTION…..

Week 4 Lab Lecture

• Number 9

USE YOUR RESULTS FROM THE SURVEY DATA IN NUMBER 2 ANDCOMPARE THEM TO THE RESULTS FOR ½ IN NUMBER 5. EXPLAINWHY THEY DIFFER (HINT: ONE IS _________ AND THE OTHER IS______________) ABOUT A PARAGRAPH

Week 4 Lab Lecture

• Come see me at the “Statcave”• www.facebook.com/statcave• You DO NOT have to be a Facebook person to

see these.• If you are, become a fan.• IT IS NOT REQUIRED TO BE ON FACEBOOK. IT’S

SOMETHING I DO FOR FUN.• I post charts there because it is easy for me to

do.