Day 1 2 3 4 Number of Plants 3 8 5 ? Ethan is counting the number of new plants that appear in his garden each day. The numbers so far are shown in the table. Which number of plants on day 4 will give Ethan’s data a mean absolute deviation of 1.5? A) 3 B) 4 Eliminate C) 5 D) 7
4 is the solution. There is more than one way to solve this problem. The easiest way may be to check each choice. Plug in each choice for day 4 and solve for the mean absolute deviation.
