Compute mean deviation from mean of the following distribution-Wine Marks - 10-20 - 20-30 - 30-40 - 40-50 - 50-60 - 60-70 - 70-80 - 80-90 1Wline t e x t No- of students - 8 - 10 - 15 - 25 - 20 - 18 - 9 - 5 Wlinearray

Computation of mean deviation from the mean [ Class amp; numbers of students f_i amp; Mid points x_i ...

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Mean Deviation about Mean

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Question

Compute mean deviation from mean of the following distribution :

$\begin{matrix} Marks & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 & 70 - 80 & 80 - 90 No. of students & 8 & 10 & 15 & 25 & 20 & 18 & 9 & 5 \end{matrix}$

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

Class Interval	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$
Frequency	$10$	$6$	$8$	$12$	$5$	$9$

Wages per week	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$	$70 - 80$
No. of workers	$4$	$6$	$10$	$20$	$10$	$6$	$4$

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