Answer:
1.7
Explanation:
You want the mean absolute deviation of the data {5, 5, 6, 2, 9}.
MAD
The mean absolute deviation is computed nicely by a suitable calculator. The Desmos calculator gives the result in the first attachment.
The mean absolute deviation is about 1.7.
Definition
The mean absolute deviation is the mean of the absolute values of the differences between the data and the mean of the data. The computation of this is shown in the second attachment. The mean of the data is 5.4.
The absolute value of the difference from the data and 5.4 is shown, and the mean of those differences is computed as 1.68.
The mean absolute deviation is about 1.7.
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