Mathematics · essential
Standard deviation of ungrouped data for JEE
Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data
Formula
\(\sigma=\sqrt{\frac{1}{n}\sum_{i=1}^{n}(x_i-\bar{x})^2}\)
Variables: \(x_i\): observations, \(\bar{x}\): mean.
Spread of raw data; comparison using coefficient of variation.