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  4. The mean deviation of the data 2,9,9,3,6,9,4 from the mean is

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Q. The mean deviation of the data $2,9,9,3,6,9,4$ from the mean is

Statistics

Solution:

Mean $(\bar{x}) =\frac{42}{7}=6 $
MD $(\bar{x}) =\frac{\Sigma\left|x_i-\bar{x}\right|}{n} $
$=\frac{4+3+3+3+0+3+2}{7}=2.57$