# 4: Z-scores and the Standard Normal Distribution

- Page ID
- 7096

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- 4.1: Normal Distributions
- The normal distribution is the most important and most widely used distribution in statistics. It is sometimes called the “bell curve,” although the tonal qualities of such a bell would be less than pleasing. It is also called the “Gaussian curve” of Gaussian distribution after the mathematician Karl Friedrich Gauss.

- 4.2: Z-scores
- A z -score is a standardized version of a raw score ( x ) that gives information about the relative location of that score within its distribution.