noncentral chi-square distribution


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noncentral chi-square distribution

[‚nän¦sen·trəl ¦kī ‚skwer ‚dis·trə′byü·shən]
(statistics)
The distribution of the sum of squares of independent normal random variables, each with unit variance and nonzero mean; used to determine the power function of the chi-square test.
References in periodicals archive ?
From the parsimony class of fit statistics, we used the root-mean-square error of approximation, which relies on the noncentral chi-square distribution and penalizes for model complexity.
has a noncentral chi-square distribution with v degrees of freedom and noncentrality parameter [lambda] = [[SIGMA].
1] has a noncentral chi-square distribution then the distribution of X = [square root of [X.
2] has an independent noncentral chi-square distribution with v degrees of freedom and noncentrality parameter [lambda], then
Johnson, Tables of Percentile Points of Noncentral Chi-Square Distribution, Mimeo Series 568, Institute of Statistics, University of North Carolina, Chapel Hill, NC (1968).