A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05

, and checks a randomly chosen sample of 50 classes. calculate x?

, the t?

-statistic? and the p value?

can normality be assumed?

Since the p value is (greater/less) ? than the significance level 0.05,

the null hypothesis(fails to be rejected/is rejected)?

(insufficient/sufficient) ? evidence exists that the mean GPA is greater than 2.75.