Question

Please help me to find this out..

Answer 1

The standard deviation is defined as the square root of the variance:

`\displaystyle \text{Variance: } \sigma^2 = \sum_(i=1)^N ((x_i-\mu)^2)/(N)`

`\displaystyle \text{Standard deviation: } \sigma = \sqrt{\sum_(i=1)^N ((x_i-\mu)^2)/(N)}`