Elementary Statistics: Picturing the World (7th Edition)
7th Edition
ISBN: 9780134683416
Author: Ron Larson, Betsy Farber
Publisher: PEARSON

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Textbook Question
Chapter 7.2, Problem 34E

Hypothesis Testing Using a P-Value In Exercises 31–36,

1. (a) identify the claim and state H0 and Ha.
2. (b) find the standardized test statistic z.
3. (c) find the corresponding P-value.
4. (d) decide whether to reject or fail to reject the null hypothesis.
5. (e) interpret the decision in the context of the original claim.

34. Acceleration Times A consumer group claims that the mean acceleration time from 0 to 60 miles per hour for a sedan is 6.3 seconds. A random sample of 33 sedans has a mean acceleration time from 0 to 60 miles per hour of 7.2 seconds. Assume the population standard deviation is 2.5 seconds. At α = 0.05, can you reject the claim? (Source: Zero to 60 Times)

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