FOR NEXT 3 QUESTIONS USE THE FOLLOWING DIRECTION: Manager of a grocery store wants to test to determine whether or

not the mean waiting time of its customers is significantly more than 4 minutes. He takes a random sample of 36 customers and finds that the average length of time it took the customers in the sample to check out was 4.6 minutes. A national study estimates that standard deviation of length of time of grocery store customers is 1.8 minutes. What is the computed value of “test statistics” for this study?

1.96

1.64

2.00

0.056

None of the above

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Question 39

2.5 pts

The P-value of this study is

between 0.005 to 0.01

0.01

0.025

0.0228

0.9772

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Question 40

2.5 pts

At 5% level of significance, it can be concluded that the mean of the population is

significantly greater than 4

not significantly greater than 4

significantly less than 4

significantly less than 4.6