chi-square test for independence

См. также в других словарях:

• Chi-square test — is often shorthand for Pearson s chi square test. A chi square test (also chi squared or chi^2 test) is any statistical hypothesis test in which the test statistic has a chi square distribution when the null hypothesis is true, or any in which… …   Wikipedia

• Pearson's chi-square test — Pearson s chi square ( chi;2) test is the best known of several chi square tests – statistical procedures whose results are evaluated by reference to the chi square distribution. Its properties were first investigated by Karl Pearson. In contexts …   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-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-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

• G-test — In statistics, G tests are likelihood ratio or maximum likelihood statistical significance tests that are increasingly being used in situations where chi square tests were previously recommended.The commonly used chi squared tests for goodness of …   Wikipedia

• Fisher's exact test — is a statistical significance test used in the analysis of categorical data where sample sizes are small. It is named after its inventor, R. A. Fisher, and is one of a class of exact tests. Fisher devised the test following a comment from Muriel… …   Wikipedia

• Yates' correction for continuity — In statistics, Yates correction for continuity, or Yates chi square test is used in certain situations when testing for independence in a contingency table. It is a requirement that a chi square test have the assumption that the discrete… …   Wikipedia

• Wald-Wolfowitz runs test — The runs test (also called Wald Wolfowitz test) is a non parametric test that checks a randomness hypothesis for a two valued data sequence. More precisely, it can be used to test the hypothesis that the elements of the sequence are mutually… …   Wikipedia

• McNemar's test — In statistics, McNemar s test is a non parametric method used on nominal data. It is applied to 2 × 2 contingency tables with a dichotomous trait, with matched pairs of subjects, to determine whether the row and column marginal… …   Wikipedia

• Jarque-Bera test — In statistics, the Jarque Bera test is a goodness of fit measure of departure from normality, based on the sample kurtosis and skewness. The test statistic JB is defined as :mathit{JB} = frac{n}{6} left( S^2 + frac{(K 3)^2}{4} ight),where n is… …   Wikipedia