Sxx Variance Formula

. This version is often easier to use if you are calculating by hand with large datasets.

. It is a fundamental component in calculating the sample variance and the slope of a regression line . Sxxcap S sub x x end-sub There are two common ways to express the Sxxcap S sub x x end-sub Sxx Variance Formula

There are two ways to calculate it. Both give the same result, but one is usually easier for hand calculations. 1. The Definitional Formula Sxx Variance Formula

[ S_xx = \sum_i=1^n (x_i - \barx)^2 ]