If the sum of the squares of deviations for 10 observations taken from their means is 2.5, then write the value of standard deviation.

Answer

standard deviation is `0.5`

Explanation

Here, `N=10` and mean `=2.5`



The square of each division `=\frac{2.5}{10}=0.25`



Standard deviation `\sigma=\sqrt{0.25}`


$$
\sigma=0.5
...