Mathematics · essential
Variance of ungrouped data for JEE
Calculation of standard deviation, variance and mean deviation for grouped and ungrouped data
Formula
\(\sigma^2=\frac{1}{n}\sum_{i=1}^{n}(x_i-\bar{x})^2\)
Variables: \(x_i\): observations, \(\bar{x}\): mean, \(n\): number of observations.
Conditions: Population variance form used in school/JEE statistics.
Dispersion of raw data.