Task# Average Number of Siblings

Illustrative MathematicsVaries

The goal of this task is to compare the mean and median in a context where the data is slightly skewed to the right. The two large data values raise the mean significantly while not impacting the median. The mean communicates the mathematical average of the number of siblings while the median shows that most of the students have very few siblings. While it has not been requested (in the interest of making this task more accessible), a box and whiskers plot would communicate both the median value and the fact that the data is skewed to the right.