Q. 93.6( 33 Votes )

Find the mean deviation about the mean for the data in Exercises.

Answer :

We make the following table and add other columns after calculations.

So, we can calculate the absolute values of the deviations from the mean, i.e., |x_i – x̅|, as shown in the table.

Therefore, we have

And

Hence, the mean deviation about the mean for the given data is 157.92.

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