An F-test is any statistical test used to compare the variances of two samples or the ratio of variances between multiple samples. The test statistic,...

Test Card F is a test card that was created by the BBC and used on television in the United Kingdom and in countries elsewhere in the world for more than...

an F-test of equality of variances is a test for the null hypothesis that two normal populations have the same variance. Notionally, any F-test can be...

California F-scale is a 1947 personality test, designed by German Theodor W. Adorno and others to measure the "authoritarian personality". The "F" stands...

A chi-squared test (also chi-square or χ2 test) is a statistical hypothesis test used in the analysis of contingency tables when the sample sizes are large...

permutation test involves two or more samples. The null hypothesis is that all samples come from the same distribution H 0 : F = G {\displaystyle H_{0}:F=G} ...

The TestDaF, formally Test Deutsch als Fremdsprache ("Test of German as a foreign language"), is a standardised language test of German proficiency for...

Kolmogorov–Smirnov test (K–S test or KS test) is a nonparametric test of the equality of continuous (or discontinuous, see Section 2.2), one-dimensional...

f} has a local minimum at x {\displaystyle x} . If f ″ ( x ) = 0 {\displaystyle f''(x)=0} , the test is inconclusive. In the last case, Taylor's Theorem...

implementations of Levene's test. Bartlett's test F-test of equality of variances Box's M test Levene, Howard (1960). "Robust tests for equality of variances"...

significantly skewed, the Kruskal-Wallis test is more powerful at detecting differences among treatments than ANOVA F-test. On the other hand, if the population...

The Wilcoxon signed-rank test is a non-parametric rank test for statistical hypothesis testing used either to test the location of a population based...

U} test (also called the Mann–Whitney–Wilcoxon (MWW/MWU), Wilcoxon rank-sum test, or Wilcoxon–Mann–Whitney test) is a nonparametric statistical test of...

Student's t-test is a statistical test used to test whether the difference between the response of two groups is statistically significant or not. It...

A/B testing (also known as bucket testing, split-run testing, or split testing) is a user experience research method. A/B tests consist of a randomized...

test, namely the likelihood-ratio test and the Lagrange multiplier test (also known as the score test). Robert F. Engle showed that these three tests...

common test statistics are tests for nested models and can be phrased as log-likelihood ratios or approximations thereof: e.g. the Z-test, the F-test, the...

flexural test provides values for the modulus of elasticity in bending E f {\displaystyle E_{f}} , flexural stress σ f {\displaystyle \sigma _{f}} , flexural...

dogfighting. The F-111B was not ordered into production and the F-111B prototypes were used for testing before being retired. The planned F-111B was replaced...

intention that they be used as test aircraft in the F-111A program. Ultimately however, the two F-111Ks were never operated as test aircraft – in July 1968,...

A Z-test is any statistical test for which the distribution of the test statistic under the null hypothesis can be approximated by a normal distribution...

development and testing led to expensive design changes and retrofits. The F-35 first flew in 2006 and entered service with the U.S. Marine Corps F-35B in July...

f ( x ) . {\displaystyle f(x).} Instead of acting on points, distribution theory reinterprets functions such as f {\displaystyle f} as acting on test...

Shapiro–Wilk test is a test of normality. It was published in 1965 by Samuel Sanford Shapiro and Martin Wilk. The Shapiro–Wilk test tests the null hypothesis...

used in Z tests or in any other tests derived from the normal distribution, such as t tests, F tests and chi-squared tests. If the residuals are not normally...

of prospective employees for a range of occupations. The test was created in 1939 by Eldon F. Wonderlic. It consists of 50 multiple choice questions to...

as the null distribution of a test statistic, most notably in the analysis of variance (ANOVA) and other F-tests. The F-distribution with d1 and d2 degrees...

The TestDaF-Institut is an institute for language testing in Bochum, Germany. It runs the TestDaF. The institute is part of the Society for Academic Study...

technology demonstrator, the test data from which validated the concept. On 1 November 1978, it was decided to proceed with the F-117 development program....

air-to-air missiles. Like the earlier F-5s, the test F-20s were equipped with two M39 cannon mounted in the nose. Production F-20s may have substituted two Ford...