27. Test scores. Three Statistics classes all took the same below. test. Histograms of the scores for each class are shown 100- 80 4 Scores 24 60 # of Students 2 40 30 20 60 90 median A B Class 1 C 1 63.75 A # of Students N C 3 4 3 5 3 4 241 30 60 90 Class 2 median 77. 083 # of Students 2 24 30 60 90 median Class 3 a) Which class had the highest mean score? b) Which class had the highest median score? c) For which class are the mean and median most dif- ferent? Which is higher? Why? d) Which class had the smallest standard deviation? e) Which class had the smallest IQR? 28. Test scores. Look again at the histograms of test scores for the three Statistics classes in Exercise 27. a) Overall, which class do you think performed better on the test? Why? b) How would you describe the shape of each distribu- tion? c) Match each class with the corresponding boxplot at the top of the next column