Key Concepts

• The chi-square distribution is a distribution that is skewed to the right.
• The variability (or spread) of the chi-square distribution depends on the degrees of freedom of the distribution.
• The test statistics for a chi-square distribution are always greater than or equal to zero.

Glossary

Chi-square Distribution: a distribution that is used when doing certain types of hypothesis testing, including chi-square goodness-of-fit, tests of independence, and tests of homogeneity.