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13.Statistics
medium

$8, 12, 13, 15,22$  અવલોકનોનું વિચરણ :

A

$21$

B

$21.2$

C

$21.4$

D

આપેલ પૈકી એક પણ નહિં

Solution

Given distribution is, $8,12,13,15,22$

Here, $n=5$ and $\operatorname{mean} \overline{ x }=\frac{8+12+13+15+22}{5}=\frac{70}{5}=14$

$\therefore$ Variance $=\frac{\sum| x -\overline{ x }|^2}{ n }=\frac{6^2+2^2+1^2+1^2+8^2}{5}=\frac{106}{5}=21.2$

Standard 11
Mathematics

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