Normal distributions and the empirical rule

Here we introduce perhaps the most important type of distribution in statistics — the normal distribution. We'll look at what exactly makes a density curve "normal," and we'll learn about the empirical rule (also called the 68-95-99.7 rule).

Qualitative sense of normal distributions

Normal distribution problems: Empirical rule

Standard normal distribution and the empirical rule (from ck12.org)

More empirical rule and z-score practice (from ck12.org)

Empirical rule