1. For the data in the Excel file Student Grades, perform an appropriate test to determine whether the average scores for the midterm and the final are the same. 2. For the data in the Excel file Cell Phone Survey, apply ANOVA to determine if the mean signal strengths are the same for the three different types of cell phones. 3. An engineer measured the surface finish of 35 parts produced on a lathe, noting the revolutions per minute of the spindle and the type of tool used (see the Excel file Surface Finish). Use ANOVA to test the hypothesis that the mean surface finish is the same for each tool. If the null hypothesis is rejected, apply the Tukey–Kramer multiple comparison procedure to identify significant differences.