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In statistical significance testing, a one-tailed test or two-tailed test are alternative ways of computing the statistical significance of a data set in terms of a test statistic, depending on whether only one direction is considered extreme (and unlikely) or both directions are considered ... - read more

Purpose: Test if variances from two populations are equal An F-test (Snedecor and Cochran, 1983) is used to test if the variances of two populations are equal. - read more

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