Find the mean deviation about the mean for the data in
$x_{i}$ $5$ $10$ $15$ $20$ $25$
$f_{i}$ $7$ $4$ $6$ $3$ $5$

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Solution

$\begin{matrix} ¯ x = \frac{350}{25} = 14 M . D = \sum f | x - π | = \frac{158}{14} = 11.285 \end{matrix}$

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Find the mean deviation about the mean for the given data.

$\begin{matrix} x_{i} & 5 & 10 & 15 & 20 & 25 f_{i} & 7 & 4 & 6 & 3 & 5 \end{matrix}$

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$f_{i}$	$6$	$8$	$15$	$3$	$8$	$4$

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x_i	5	10	15	20	25
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