A researcher wants to test whether the average college student watches videos on Youtube no less than 20 hours per week. She sets up the testing hypotheses as H subscript 0 colon mu equals 20 H subscript 1 colon mu less than 20 And she finds that the mean number of hours college students spend on Youtube was 19 hours, and the standard deviation was 5 hours from a random sample of 100 college students. She wants to use a non-conventional significance level of 2%. Find the critical value for the hypothesis tes