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Question 30A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statisticsexam has a standard deviation that is less than 5.0 minutes. A random sample of 15 students was selected, and the samplestandard deviation for the time needed to complete the exam was found to be 4.0 minutes. The test statistic for this hypothesistest would be ________.
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CommentsCorrect!!Max Score: 4Actual Score: 4Question 31YouTube would like to test the hypothesis that the standard deviation for the length of an online video watched by a user ismore than 2 minutes. A random sample of 21 people who watched online videos was selected. The sample standard deviationfor the length of the video was found to be 2.5 minutes. The test statistic for this hypothesis test would be ________.