This Problem Set is a part of the Lesson 22, Unit 5, Grade 7. A school is trying to decide which reading program to purchase. How many MADs separate the mean reading comprehension score for a standard program and an activity-based program? What recommendation would you make based on this result? The number of MADs that separate the programs is not large enough to indicate that one program is better than the other program based on mean scores. There is no noticeable difference in the two programs.