Refer to the U.S. Department of Transportation study of the level of cell phone use by drivers while they are in the act of driving a motor passenger vehicle, presented in Exercise 7.119 (p. 342). Recall that in a random sample of 1,165 drivers selected across the country, 35 were found using their cell phone.
a. Conduct a test (at α = .05) to determine whether p , the true driver cell phone use rate, differs from .02.
b. Does the conclusion, you drew in part a agree with the inference you derived from the 95% confidence interval for p in Exercise 7.119? Explain why or why not.

  • CreatedMay 20, 2015
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