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13.Statistics
easy
$2, 4, 6, 8, 10$ નું વિચરણ શોધો.
A
$8$
B
$\sqrt 8 $
C
$6$
D
આપેલ પૈકી એક પણ નહિં
Solution
Mean $(\overline{ x })=\frac{\sum x _i}{n}$
$=\left(\frac{(2+4+6+8+10)}{5}\right)$
$=6$
Variance $\left(\sigma^2\right)=\frac{\Sigma( x -\overline{ x })^2}{n}$
$=\frac{(2-6)^2+(4-6)^2+(6-6)^2+(8-6)^2+(10-6)^2}{5}$
$=\frac{(16+4+0+4+16)}{5}$
$=\frac{40}{5}$
$=8$
Standard 11
Mathematics
