Question 30 A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes. A random sample of 15 students was selected, and the sample standard deviation for the time needed to complete the exam was found to be 4.0 minutes. The test statistic for this hypothesis test would be ________. Answer 8.96 Comments Correct!! Max Score: 4 Actual Score: 4 Question 31 YouTube would like to test the hypothesis that the standard deviation for the length of an online video watched by a user is more than 2 minutes. A random sample of 21 people who watched online videos was selected. The sample standard deviation for the length of the video was found to be 2.5 minutes. The test statistic for this hypothesis test would be ________. Answer 4.66 Comments The correct answer is: 31.25 Max Score: 4 Actual Score: 0 Question 32 The test statistic used to compare the variances of two populations will always be greater than 1.0 Answer True Comments Correct!!