chi square function

平方函数

English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.

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  • Chi-square distribution — Probability distribution name =chi square type =density pdf cdf parameters =k > 0, degrees of freedom support =x in [0; +infty), pdf =frac{(1/2)^{k/2{Gamma(k/2)} x^{k/2 1} e^{ x/2}, cdf =frac{gamma(k/2,x/2)}{Gamma(k/2)}, mean =k, median… …   Wikipedia

  • Chi-square target models — Swerling models were introduced by Peter Swerling and are used to describe the statistical properties of the radar cross section of complex objects.General Target ModelSwerling target models give the RCS of a given object based on the chi square… …   Wikipedia

  • chi-square distribution — noun Date: circa 1956 a probability density function that gives the distribution of the sum of the squares of a number of independent random variables each with a normal distribution with zero mean and unit variance, that has the property that… …   New Collegiate Dictionary

  • chi-square distribution — noun : a probability density function that gives the distribution of the sum of the squares of a number of independent random variables each having a normal distribution with zero mean and unit variance, that has the property that the sum of two… …   Useful english dictionary

  • Noncentral chi-square distribution — Probability distribution name =Noncentral chi square type =density pdf cdf parameters =k > 0, degrees of freedom lambda > 0, non centrality parameter support =x in [0; +infty), pdf =frac{1}{2}e^{ (x+lambda)/2}left (frac{x}{lambda} ight)^{k/4 1/2} …   Wikipedia

  • Scale-inverse-chi-square distribution — Probability distribution name =Scale inverse chi square type =density pdf cdf parameters = u > 0, sigma^2 > 0, support =x in (0, infty) pdf =frac{(sigma^2 u/2)^{ u/2{Gamma( u/2)} frac{expleft [ frac{ u sigma^2}{2 x} ight] }{x^{1+ u/2 cdf… …   Wikipedia

  • Inverse-chi-square distribution — Probability distribution name =Inverse chi square type =density pdf cdf parameters = u > 0! support =x in (0, infty)! pdf =frac{2^{ u/2{Gamma( u/2)},x^{ u/2 1} e^{ 1/(2 x)}! cdf =Gamma!left(frac{ u}{2},frac{1}{2x} ight)igg/, Gamma!left(frac{… …   Wikipedia

  • Chi-squared test — Chi square test is often shorthand for Pearson s chi square test. A chi square test, also referred to as chi squared test or χ2 test, is any statistical hypothesis test in which the sampling distribution of the test statistic is a chi square… …   Wikipedia

  • Chi-squared distribution — This article is about the mathematics of the chi squared distribution. For its uses in statistics, see chi squared test. For the music group, see Chi2 (band). Probability density function Cumulative distribution function …   Wikipedia

  • Chi distribution — chi Probability density function Cumulative distribution function parameters …   Wikipedia

  • Moment-generating function — In probability theory and statistics, the moment generating function of any random variable is an alternative definition of its probability distribution. Thus, it provides the basis of an alternative route to analytical results compared with… …   Wikipedia

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