The students in three sections of Mechanical Engineering took the same final exam. Figure 5.23 shows the scores for the students in each section. Each circle represents an exam score.

a. What is the range of scores for each of the three classes? Do you think that the range gives a useful sense of the variability in scores in each of the three sections?

b. For each class, circle the points at which the interquartile range begins and ends.

c. According to the points you circled in Part

b, do the interquartile ranges for the three classes overlap?