An article appearing in The Exponent, an independent college newspaper published by the Purdue Student Publishing Foundation, reported that the average American college student spends one hour (60 minutes) on Facebook daily. (Data extracted from bit.ly/QqQHow.) In order to test the validity of this statement, you select a sample of 30 Facebook users at your college. The results for the time spent on Facebook per day (in minutes) are stored in Facebook time.
a. Is there evidence that the population mean time Facebook time is different from 60 minutes? Use the p-value approach and a level of significance of 0.05.
b. What assumption about the population distribution is needed in order to conduct the t test in (a)?
c. Make a list of the various ways you could evaluate the assumption noted in (b).
d. Evaluate the assumption noted in (b) and determine whether the test in (a) is valid.