Question

Here are the science test scores from Ms. O’Donnell’s class:

55, 60, 70, 70, 75, 75, 75, 80, 80, 85, 85, 85, 85, 90, 90, 95, 100

Find the mean absolute deviation (MAD).

(1 point)
The MAD is
.

Answer 1

Mean = 1355/17 ≈ 79.7059.
Sum of absolute deviations ≈ 155.8824, so MAD = 155.8824/17 ≈ 9.17.

The MAD is about 9.17.