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Mean deviation about mean from the following data:
$\begin{array}{l} x_{i} : 3 9 17 23 27 \\ f_{i} : 8 10 12 9 5, \end{array}$
is

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Correct option is B

Calculation of mean deviation about mean.391723278101295249020420713512628129660247260N=Σfi=44 Σfixi=660 Σfixi−15=312mean =X¯=ΣfixiN=66044=15Mean deviation =M⋅D⋅=1NΣfixi−15=31244=7.09≃7

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Mean deviation about mean from the following data:xi: 3 9 17 23 27fi: 8 10 12 9 5, is

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Mean deviation about mean from the following data:
$\begin{array}{l} x_{i} : 3 9 17 23 27 \\ f_{i} : 8 10 12 9 5, \end{array}$
is