A certain vehicle emission inspection station advertises that the wait time for customers is less than

8

minutes. A local resident wants to test this claim and collects a random sample of

49

wait times for customers at the testing station.

He

finds that the sample mean is

6.57

minutes, with a standard deviation of

2.9

minutes. Does the sample evidence support the inspection station's claim? Use the

=0.01

level of significance to test the advertised claim that the wait time is less than

8

minutes.

What is the value of the test statistic

What is the P-value