7. Use SPSS to compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability? Test 1 Test 2 Test 3 50 50 49 48 49 47 51 51 51 46 46 55 49 48 55 48 53 45 49 49 47 49 52 45 50 48 46 50 55 53