Use Sheet 3 of the Excel file to answer the following questions. A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.750 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a histogram, and calculate , the t-statistic, and the p-value. From the histogram, can normality be assumed? Pick v Ex: 0.123 t = Round all answers to 3 decimal places. D Since the p-value is Pick than the significance level 0.05, the null hypothesis | Pick V Pick evidence exists that the mean GPA is greater than 2.750