# Statistics Glossary

## Variables

Definitions: continuous (quantitative), categorical (nominal, ordinal), interval, ratio&#x20;

Statistical Description: mean, median, std, variance, variation, percentile&#x20;

Univariate: shape, center, spread, relative position&#x20;

Bivariate: correlation between the --- continuous-continuous/category-category/continuous-category.&#x20;

Multivariate: correlation through regression

## Distributions

### Definitions

Parametric vs. Non-Parametric: a **parametric** statistical test is one that makes assumptions about the parameters (defining properties) of the population distribution(s) from which one's data are drawn, while a **non-parametric** test is one that makes no such assumption

Unimodal

Bimodal

Symmetric

Fat Tail/skewed

Density Function

Probability Distribution Function

Cumulative Density Function&#x20;