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

A weakness of the chi-square goodness-of-fit test is its dependence on the choice of histogram ... The following statements refit the lognormal distribution using default midpoints (0.3 to 1.8 by 0.3) ...

computes a chi-square goodness-of-fit test for specified proportions. The chi-square goodness-of-fit test examines whether the children's hair color has a specified multinomial distribution for two ...