Test scores for 23 students in an introductory statistics course are displayed in the stemplot below. The scores range from 72 to 98. A stemplot titled test scores is incomplete. It has values 72 and 98, and other values are not shown. The teacher wants to encourage her students by reporting that, overall, the scores were high. Should she use the mean or median to summarize the center of the distribution of scores? She could choose either one because they are equal. She should report the mean because it will be greater than the median. She should report the median because it will be greater than the mean. All the missing scores are needed in order to decide.