Variance Formula //free\\ - Sxx

Here, . This reveals a profound truth:

The formula is used to measure how much a set of numbers spreads out from their average. Sxx Variance Formula

"That's why your variance is inflated," Jonah said softly. "Think about the geometry of it. $S_xx$ is the lever arm. It’s the amount of information you have about the predictor variable. If $S_xx$ is huge, your data is spread out. You have a long lever to balance the fulcrum. You can place the regression line with precision." Sxx Variance Formula