The owner of a local nightclub has recently surveyed a random sample of n = 250 customers of the club.She would now like to determine whether or not the mean age of her customers is more than 30.If so,she plans to alter the entertainment to appeal to an older crowd.If not,no entertainment changes will be made.Which of the following tests will you perform to help her decide?
A)t test for the mean.
B)Z test for the proportion.
C)Pooled-variance t test.
D)Separate-variance t test.

Question

Quizplus · Accepted Answer

We need to test whether the mean age of the customers is more than 30 or not. Hence, we need to perform a hypothesis test for the population mean. Since the sample size is large (n=250), we can use the t test for the mean.

The Owner of a Local Nightclub Has Recently Surveyed a Random