Click this link to download the spreadsheet for use in this activity. Jump to level 1 use Sheet 1 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 2.75 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 ax: 1234 than the significance level 0.05, the null hypothesis Pick Since the p-value is Pick Pick v evidence exists that the mean GPA is greater than 2.75