Question

The mean wait time for a local medical center has been 15 minutes. An analyst at the center believes that the mean time has changed. To see if there is evidence in the data to support the analyst's suspicion, the hypothesis test for the population mean should be a _____tailed test using __________of the sampling distribution

Answer 1

The hypothesis test for the population mean in this case should be a two-tailed test using the t-distribution of the sampling distribution.

Step-by-step explanation:

The hypothesis test for the population mean in this case should be a two-tailed test using the t-distribution of the sampling distribution.

A two-tailed test is appropriate when the analyst wants to determine if the mean time has changed in either direction, either greater or smaller than the previous mean. The t-distribution is used when the population standard deviation is unknown and must be estimated from the sample standard deviation.