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4 February, 02:24

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

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Answers (1)
  1. 4 February, 02:58
    0
    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
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