A large university is interested in learning about the average time it takes stu

Question

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then used conduct a test of hypothesis. The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Find the large-sample rejection region for the test of interest to the college when using a level of significance of 0.05. (choose 1)

a. Reject H0 if z < -1.645 or z > 1.645.

b. Reject H0 if z > 1.645.

c. Reject H0 if z < -1.96 or z > 1.96.

d. Reject H0 if z < -1.96.

Explanation / Answer

H0: µ=20

H1: µ 20    (the average travel time of all the university's students differed from 20 minutes )

    Two tailed test

at level of significance of 0.05

Reject H0 if z < -1.645 or z > 1.645.

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