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The variance of the data 2, 4, 6,8, 10 is.

Answers (1)

Use the concept of

Variance -

In case of discrete data 

\dpi{100} \sigma ^{2}= \left ( \frac{\sum x_{i}^{2}}{n} \right )-\left ( \frac{\sum x_{i}}{n} \right )^{2}

-

 

 V=\frac{1}{n} \sum x^{2}_{i} - (\bar{x})^{2}

where \bar{x} = \frac{2+4+6+8+10}{5}

\frac{30} {5} = 6

=\frac{1}{5}(220)-36

= 44-36 = 8

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