What is the chi-squared test? The chi-squared test, often written as χ 2 test, is a statistical hypothesis test used in the analysis of categorical variables to determine whether observed data are ...

Wald's method constructs test statistics having chi-squared limiting distributions from estimators having nonsingular multivariate normal limiting distributions, using the inverse of the covariance ...

A statistical test that allows one to determine whether observed quantities of a specific characteristic differed from the expected value purely by chance.

A bivariate change of variable is proposed that elucidates the major distributional identities involving the two beta distributions and the chi-squared distribution. These identities are then seen to ...

"Significance" has a very particular meaning in biology thanks to statistics. How does this term prove an experiment's results are worth special attention?