The ages of two groups of karate students are shown in the following dot plots: a dot plot shows age in years on the horizontal axis. for group a, there are 2 dots on 4, 5 dots on 5, 3 dots on 7, 4 dots on 8, 2 dots on 9, 2 dots on 11, and 1 dot on 14. for group b, there is 1 dot on 7, 2 dots on 8, 1 dot on 9, 1 dot on 11, 1 dot on 16, 2 dots on 19, 2 dots on 20, 2 dots on 21, and 1 dot on 26. the mean absolute deviation (mad) for group a is 2.07 and the mad for group b is 5.51. which of the following observations can be made using these data?