Find the mean deviation about the mean for the data.

Income per day Number of persons
0-100 4
100-200 8
200-300 9
300-400 10
400-500 7
500-600 5
600-700 4
700-800 3

 

Asked by Pragya Singh | 1 year ago |  84

1 Answer

Solution :-

Here, \(N=\displaystyle\sum_{i=1}^{8} f_i = 50 \),

\( \displaystyle\sum_{i=1}^{8} f_ix_i = 17900\),

\( \overline{X} = \dfrac{1}{N} \displaystyle\sum_{i=1}^{8} f_ix_i \)

\( = \dfrac{1}{50} \times 17900= 358\)

MD.(M) = \(\dfrac{1}{N} \displaystyle\sum_{i=1}^{5} f_i|x_i-\overline {x}| \)

\( = \dfrac{1}{50}\times 7896 = 157.92\)

Answered by Abhisek | 1 year ago

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