Using a one-tail test to determine whether the average time is takes to run a mile is GREATER than 9 minutes, what critical value should be used given a significance level of .10 using your sample of 40 observations? And what would you conclude to the hypothesis test? (reject the null or fail to reject the null?)a. z = 1.645b. t = -1.303c. t = 1.303d. z = -1.645

After surveying students in her homeroom, katie decided to use a number cube to predict the probability that a randomly chosen student in her school planned to stay after school today for extracurricular activities. in katie’s simulation, a roll of 1 represents staying after school, while rolls of 2, 3, 4, 5, or 6 represent leaving school at the end of classes. according to katie’s model, what is the probability that three randomly chosen students will all stay after school for extracurricular activities today?