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Cosa (chi) è D'Agostino's K-squared test - definizione
D'Agostino's K-squared test
GOODNESS-OF-FIT MEASURE IN STATISTICS
D'Agostino-Pearson Test; D’Agostino’s K-squared test
In statistics, D'Agostino's K2 test, named for Ralph D'Agostino, is a goodness-of-fit measure of departure from normality, that is the test aims to gauge the compatibility of given data with the null hypothesis that the data is a realization of independent, identically distributed Gaussian random variables. The test is based on transformations of the sample kurtosis and skewness, and has power only against the alternatives that the distribution is skewed and/or kurtic.
Chi-squared test
STATISTICAL TEST
Chi square test; Chi squared test; Chi-square tests; "Chi-squared" test; Chi-squared statistic; Chi-square statistics; Chi-Square; Chi-square significance test; Chi test; Correction for continuity; Χ2; Χ² test; Chi Square test; Chi-square test; Chi-Square Test; Chi-square goodness of fit test; Chi-squared goodness of fit test; Chi-squared tests
A chi-squared test (also chi-square or test) is a statistical hypothesis test that is valid to perform when the test statistic is chi-squared distributed under the null hypothesis, specifically Pearson's chi-squared test and variants thereof. Pearson's chi-squared test is used to determine whether there is a statistically significant difference between the expected frequencies and the observed frequencies in one or more categories of a contingency table.
chi-square test
STATISTICAL TEST
Chi square test; Chi squared test; Chi-square tests; "Chi-squared" test; Chi-squared statistic; Chi-square statistics; Chi-Square; Chi-square significance test; Chi test; Correction for continuity; Χ2; Χ² test; Chi Square test; Chi-square test; Chi-Square Test; Chi-square goodness of fit test; Chi-squared goodness of fit test; Chi-squared tests
a statistical method assessing the goodness of fit between a set of observed values and those expected theoretically.
