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32. Statistics
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Q8 of 108 Page 33

A batsman scores runs in 10 innings as 38, 70, 48, 34, 42, 55, 63, 46, 54 and 44. The mean deviation about mean is

Mean (X)=




Here, N= 10


Mean deviation =



Hence, MD is 0

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6

The standard deviation of the data:


Is

7

The mean deviation of the series a, a+d, a+2d, ……, a+2n from its mean is

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The mean deviation of the numbers 3, 4, 5, 6, 7 from the mean is

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The sum of the squares deviations for 10 observations for 10 observations taken from their mean 50 is 250. The coefficient of variation is

Questions · 108
32. Statistics
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