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# Week 4 lecture_math_221_nov_2012

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Nov 2012 Charts for Week 4 Lecture covering the Week 4 iLab

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• This will be a great help! Statistics has been very challenging for me. I'm sorry that I didn't look at these videos before attempting to do assignment. They will help for the remainder of semester. Thanks YOU!

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### Week 4 lecture_math_221_nov_2012

1. 1. 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.)
2. 2.  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)
3. 3.  Number 1  I will be using 1/5, 2/5 and 4/5 (NOT ¼ , ½ and ¾ )
4. 4.  Now Graph All Three
5. 5.  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)
6. 6.  Number 3
7. 7.  Number 3 ETC
8. 8.  Number 4
9. 9.  Forthe first one, x ≥ 1, you would add all of the probabilities from 1 through 10 for 2/5 or calculate 1 – P(0)
10. 10.  Forthe 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))
11. 11.  Forthe third one, 4<x ≤ 7, you would add all of the probabilities from 5 through 7
12. 12.  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)
13. 13.  Number 5Mean = 10 (2/5) = 4 Std Dev = Sq Root (10)(2/5)(3/5) = 1.549
14. 14.  Number 6Mean = 10 (1/5) = 2 Std Dev = Sq Root (10)(1/5)(4/5) = 1.265
15. 15.  Number 7Mean = 10 (4/5) = 8 Std Dev = Sq Root (10)(4/5)(1/5) = 1.265
16. 16.  Number 8 USE DEFINITION OF BINOMIAL DISTRIBUTION…..
17. 17.  Number 9USE 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