Kizspy | Question: 41
(Choose 1 answer)
Vnexpress would like to test the hypothesis that the average length of an online video watched by a user is more than 6 minutes. A random sample of 80 people watched online videos that averaged 6.3 minutes in length. It is believed that the population standard deviation for the length of online videos is 1.2 minutes. Vnexpress would like to set the significance level = 0.05. The critical value for this hypothesis test would be
Α. 1.645
Β. 1.96
C. -1.96
D. -1.645
E. None of the other choices is true
Let 20.051.645, Z0.025 1.96
