Calculating Mean Absolute Deviation

The hours students reported practicing their instruments last grading quarter were 29, 20, 36, 44, 30, 32, and 40.

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The mean hours students reported practicing their instruments is

The mean absolute deviation for the data is

mean = 33

mad = 6

Step-by-step explanation:

First we need to find the mean

Add up all the numbers and divide by the number of numbers)

(29 + 20 + 36 + 44 + 30 + 32 + 40) / 7

231 / 7

33

To find the mean absolute deviation

take the positive difference for each term and then divide by the number of terms

((33-29) + (33-20) + (36-33) + (44-33) + (33-30) + (33-32) + (40-33)) / 7

42/7

6