A chi-square (χ2) statistic is a test that is used to measure how expectations compare to actual observed data or model results.

A chi-square (also called chi-squared) test is a classical statistics technique that can be used to determine if observed-count data matches expected-count data. For example, suppose you have three ...

The chi-square goodness-of-fit test examines whether the children's hair color has a specified multinomial distribution for two regions. The hypothesized distribution for hair color is 30 percent fair ...

In many biological problems, the experimenter may prefer to use a chi-square test for linear trends in proportions rather than the standard chi-square test of homogeneity. In this paper the ...