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. Use Sheet 2 of the Excel file to create a histogram, and calculate x, the t-statistic, and the p-value. From the histogram, can normality be assumed? Pick 2 = Ex: 1.234 t = P = Since the p-value is Pick than the significance level 0.05, the null hypothesis Pick C Pick C evidence exists that the mean GPA is greater than 2.75