# 3.11: Variability


Learning Objectives

• To study how much the numbers in a distribution differ from each other

Variability refers to how much the numbers in a distribution differ from each other. The most common measures are presented in "Measures of Variability." The "variability demo" allows you to change the standard deviation of a distribution and view a graph of the changed distribution.

One of the more counter-intuitive facts in introductory statistics is that the formula for variance when computed in a population is biased when applied in a sample. The "Estimating Variance Simulation" shows concretely why this is the case.

3.11: Variability is shared under a Public Domain license and was authored, remixed, and/or curated by David Lane via source content that was edited to conform to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.