A researcher collects the following data from 5 college students regarding the number of times they drank alcohol in the last 30 days. We know that the population of college students drink a mean of...

A researcher collects the following data from 5 college students regarding the number of times they drank alcohol in the last 30 days. We know that the population of college students drink a mean of 4.5 days in the last 30 days (i.e., this is the population mean).

DATA: 7, 6, 5, 7, 6

a. Is the mean level in the sample significantly different from the population mean?

b. What significance test did you use?