chi-square fit
1Chi-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… …
2chi-square test — chi′ square (or chi′ squared ) test n. sta a test that uses the quantity chi square for testing the mathematical fit of a frequency curve to an observed frequency distribution • Etymology: 1935–40 …
3Chi-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… …
4chi-square test — Statistics. a test devised by Karl Pearson that uses the quantity chi square for testing the mathematical fit of a frequency curve to an observed frequency distribution. Also, chi squared test /kuy skwaird /. [1935 40] * * * chi square test UK… …
5chi-square test — Statistics. a test devised by Karl Pearson that uses the quantity chi square for testing the mathematical fit of a frequency curve to an observed frequency distribution. Also, chi squared test /kuy skwaird /. [1935 40] * * * …
6chi-square test — any statistical hypothesis test that employs the chi square (χ2) distribution (q.v.), especially two tests applied to categorical data: the χ2 test of goodness of fit, which tests whether an observed frequency distribution fits a… …
7chi-square test — a statistical method assessing the goodness of fit between a set of observed values and those expected theoretically. → chi …
8chi-square test — /ˈkaɪ skwɛə ˌtɛst/ (say kuy skwair .test) noun Statistics a test devised to assess the mathematical goodness of fit of a frequency curve to an observed frequency distribution …
9Pearson'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 …
10Chi-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… …
