Chi-Square Distribution

**Definition:** A distribution in which a variable is distributed like the sum of the squares of any given independent random variable, each of which has a normal distribution with mean of zero and variance of one. The chi-square test is a statistical test based on comparison of a test statistic to a chi-square distribution. The oldest of these tests are used to detect whether two or more population distributions differ from one another.

**Tree numbers:** - E05.318.740.994.300 - G17.820.300 - N05.715.360.750.750.200 - N06.850.520.830.994.300