The square of a random variable having standard normal distribution is distributed as chi-square with 1 degree of freedom. The sum of squares of ’n’ independently distributed standard normal variables has a Chi-Square distribution with ’n’ degrees of freedom. The distribution is typically used to compare multiple-sample count data in contingency tables to expected values under a null hypothesis.
Statistics and data science, defined
Chi-Square Distribution
Where this gets used
We teach data science and statistics online, one subject at a time, on fixed start dates with an instructor who marks your work.