Question

What does it tell you about the test scores if one set of scores has a mean absolute deviation of 4.25 and the other scores have a mean absolute deviation of 8.5?

Answer 1

it means that the set with the deviation of 8.5 is more spread out in regards to the mean than the set with a deviation of 4.25. the typical point in the set with a deviation of 4.25 is that far from the mean of the set, whereas the typical point in the second set is 8.5 away from the mean.