A national survey shows that the average internet user views social media sites for 2.4 hours per

day. A researcher wants to know if students at the University of Waterloo use social media more

than average, so they perform a random sample of 118 students from ENVS278 in Winter 2022.

The mean social media usage from the sample is 3.5 hours per day with a standard deviation of

1.6 hours per day.

a. What statistical test is most appropriate to answer this question? Justify your choice in one

sentence. [3 marks]

b. Write appropriate null and alternative hypotheses for the test in part a. [2 marks]

c. Performing all necessary calculations, find the test statistic and associated P-value for the

statistical test you selected in part a. Assume an alpha level of 0.05 and show all calculations. [10

marks]

d. Write two sentences imagining that you are asked to communicate this result to students in

the Imprint newspaper. [3 marks]