Practice Final A WI 2011

# 35 bob surveys 8 of his employees at random and

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35. Bob surveys 8 of his employees at random and counts the number that would prefer to work from home one day a week. What’s the probability that 2 of Bob’s employees would prefer to work from home one day per week? ANS___________ 36. Bill also hears the same newscast as Bob and he conducts the same survey on a random sample of 80 of his employees. What’s the chance that at least 25 of Bill’s employees would prefer to work from home? ANS___________ For #37: Bob measured the length (in cm) and weight (in grams) of a random sample of mice of a certain species. The results of his analysis are shown below. Variable Count Mean StDev Minimum Median Maximum Length 150 168.67 43.15 63.00 163.00 280.00 Weight 150 150.77 19.76 101.00 150.50 208.00 Predictor Coef SE Coef T P Constant 39.05 25.09 1.56 0.122 Weight 0.8597 0.1650 5.21 0.000 Pearson correlation of Length and Weight = 0.394 37. ESTIMATE the average weight of all mice of this species in the population. Show all work and use proper units. Give the best possible answer. 9

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STAT 133 WI 2010 VERSION A NAME___________________________ ANSWER SHEET FOR MC/TF REC TIME_________ GROUP #______ 1. A B C D 2. A B C D 3. A B C D 4. A B C D 5. A B C D 6. A B C D 7. A B C D 8. A B C D 9. A B C D 10. A B C D 11. A B C D 12. A B C D 13. A B C D 14. A B C D 15. A B C D 16. A B C D 17. A B C D 18. A B C D 19. A B C D 20. A B C D 21. A B C D 22. A B C D 23. A B C D 24. A B C D 25. A B C D 26. A B C D 27. A B C D 28. A B C D 29. A B C D 30. A B C D 10
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