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English
Noun
chi-square distribution (plural chi-square distributions)
- (statistics) A probability distribution widely used in inferential statistics.
- 1992, Harold R. Lindman, Analysis of Variance in Experimental Design, Springer, Softcover Reprint, page 7,
- The chi-square distribution with degrees of freedom is defined to be the distribution of the sum of independent squared random variables, each having the standard normal distribution.
2003, Chin Long Chiang, Statistical Methods of Analysis, World Scientific Publishing, page 204:The family of chi-square distributions, like the "Student's" t distributions, has an infinite number of members, one for each number of degrees of freedom.
- 2012, Anthony J. Hayter, Probability and Statistics for Engineers and Scientists, 4th Edition, Cengage Learning, page 254,
- The degrees of freedom of a chi-square distribution are usually denoted by the Greek letter and can take any positive integer value.
Usage notes
The synonym central chi-square distribution is sometimes used in distinction with the more general noncentral chi-square distribution.
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