Calculate the mean deviation about mean for the following data-Wline Class - Frequency- Wline0-10 - 411Wline 10-20 - 11Wline 20-30 - 1511Wline30-40 - 20 1Wline40-50 - 9 Wline 50-60 - 5 1Wline array A- 10-92B- 11-65C- 13-7D- 12-15

The correct option is A 10.92[ Class amp; X amp; F amp;FX; 0 10 amp; 5 amp; 4 amp; 20; ...

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Mean Deviation from Mean for Continuous Series

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Question

Calculate the mean deviation about mean for the following data.

$\begin{matrix} C l a s s & F r e q u e n c y 0 - 10 & 4 10 - 20 & 11 20 - 30 & 15 30 - 40 & 20 40 - 50 & 9 50 - 60 & 5 \end{matrix}$

10.92

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11.65

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13.7

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12.15

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Solution

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Class	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
Frequency	$5$	$10$	$20$	$5$	$10$

Marks	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$
No. of students	$8$	$15$	$22$	$20$	$10$	$5$

Class	0 - 10	10 - 20	20 - 30	30 - 40	40 - 50	50 - 60	60 - 70	70 - 80
frequency	5	8	7	12	28	20	10	10