Population variance
= Population variance
For a finite population $x_1,\ldots,x_n$ with <arithmetic mean> $\bar x$, its variance is $\frac1n\sum_{i=1}^n(x_i-\bar x)^2$. It averages squared deviations over the whole population.
= Population variance
For a finite population $x_1,\ldots,x_n$ with <arithmetic mean> $\bar x$, its variance is $\frac1n\sum_{i=1}^n(x_i-\bar x)^2$. It averages squared deviations over the whole population.