The median of this problem is 140, and the average is about 144. It is not appropriate to use the average value, because five of the seven numbers in it are smaller than the average value. Obviously, it is not appropriate to use the average, nor can it reflect the general level of this group of figures. So the median in this question is appropriate.

Primary school statistics, main learning average, median, mode. The key to judge what a set of numbers is suitable for is to find out the characteristics of this set of numbers.