STAT 216 Final: STAT 216 Montana State SolutionsFinalF04
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Exam II-A - Spring 2005 - ANSWERS
1. B
2. A
3. B
4. C
5. C
6. B
7. D
8. B
9. B
10. B
11. C
12. A
13. A
14. B
15. FALSE
16. TRUE
17. FALSE
18. TRUE
19. TRUE
20. TRUE
21. TRUE
22. TRUE
23. FALSE
24. FALSE
25. A.) P(X = 0) = 1 - ( 0.17 + 0.07 + 0.04 ) = 0.72
Document Summary
Exam ii-a - spring 2005 - answers: b, a, b, c, c, b, d, b, b, b, c, a, a, b, false, true, false, true, true, true, true, true, false, false, a. ) P(x = 0) = 1 - ( 0. 17 + 0. 07 + 0. 04 ) = 0. 72. P(x > 0) = 0. 17 + 0. 07 + 0. 04 = 0. 28: a. ) 110 +/- 1. 96(40)/sqrt(25) (94. 32, 125. 68) minutes per week. We are 95% confident that the true mean of study time for an intructory statistics class is between 94. 32 and 125. 68 minutes per week: a. ) z = (270 - 266)/16 = 0. 25. C. ) z = (270 - 266)/(16/sqrt(60)) = 1. 94. D. ) part a. ) would be the most effected, because the clt means that xbar will still be approximately normal for calculations in parts b. ) and c. ), but the clt does not help part a: a. ) Hypotheses: ho: mu = 110 versus ha: mu > 110.
