Question

what are formulas for mean deviation

Answer 1

Mean= sigma fixi/sigma fi
=a+sigma fidi/sigma fi
=a+sigma fiui/sigma fi *h

Answer 2

The average of these numbers (6%5 ) is 1. 2 which is mean deviation also called mean absolute deviation, If is used as measure of dispersion where the number of values or quantities is small, otherwise standard deviation is used.

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