Varianz-Rechner

Variance measures how far a set of numbers are spread out from their average value. It's the average of the squared differences from the mean.

• Sample variance (s²): Use when your data is a subset of a larger population. Divides by n-1 (Bessel's correction).
• Population variance (σ²): Use when you have data for the entire population. Divides by n.

Standard deviation is the square root of variance. While variance is in squared units, standard deviation is in the same units as your data, making it easier to interpret.

Low variance means data points are close to the mean (consistent). High variance means data points are spread out (variable).