11. It is believed that the average hour of study per day to pass a certain exam is a Norma variable with 4 hrs. a sample of 16 students was asked and gave the following opinion of their own hours: 3,4,4,5,2,5,4,3,3,2,6,6,2,1,7,4 A. Test at 5% level of significance whether the data are consistent with the specified study hr. B. Test at 1% level of significance whether students’ study per day less hrs. to pass the same exam.