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
Make a decision?
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

A t test for the mean is appropriate here because the owner wants to determine if the mean age of customers is greater than 30, which involves comparing a sample mean to a known value.

The Owner of a Local Nightclub Has Recently Surveyed a Random