BASIC PRACTICE OF STATISTICS(REISSUE)>C
BASIC PRACTICE OF STATISTICS(REISSUE)>C
8th Edition
ISBN: 9781319341831
Author: Moore
Publisher: MAC HIGHER
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Chapter 3, Problem 3.43E

(a)

To determine

To obtain: The percent of men scored 750 or better.

(b)

To determine

To obtain: The percent of women scored 750 or better.

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Show how you get critical values of 1.65, -1.65, and $1.96 for a right-tailed, left- tailed, and two-tailed hypothesis test (use a = 0.05 and assume a large sample size).
Suppose that a sports reporter claims the average football game lasts 3 hours, and you believe it's more than that. Your random sample of 35 games has an average time of 3.25 hours. Assume that the population standard deviation is 1 hour. Use a = 0.05. What do you conclude?
Suppose that a pizza place claims its average pizza delivery time is 30 minutes, but you believe it takes longer than that. Your sample of 10 pizzas has an average delivery time of 40 minutes. Assume that the population standard deviation is 15 minutes and the times have a normal distribution. Use a = 0.05. a. What are your null and alternative hypotheses? b. What is the critical value? c. What is the test statistic? d. What is the conclusion?
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