also: カイにじょうぶんぷ
chi-square distribution; chi-squared distribution
A probability distribution used in statistics, especially for goodness-of-fit tests and independence tests. The term is technical and used in mathematical contexts.
The chi-square distribution is one of the probability distributions commonly used in statistics.
In a goodness-of-fit test, we calculate a statistic that follows a chi-square distribution.
カイ二乗検定 (chi-square test) is the statistical test that uses the chi-square distribution; カイ二乗分布 is the distribution itself.
Standard mathematical notation using the Greek letter chi (カイ) and kanji for 'squared distribution'.
From English 'chi-square distribution', where 'chi' is the Greek letter χ. The term was introduced into Japanese statistics terminology.