In a two-tailed hypothesis test for the difference between two population variances, the test statistic is an F-ratio formed by putting the larger sample variance in numerator.

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In a two-tailed hypothesis test for the difference between two population variances, the F-ratio is calculated by dividing the larger sample variance by the smaller sample variance, placing the larger variance in the numerator to ensure the F-ratio is greater than or equal to 1.

In a Two-Tailed Hypothesis Test for the Difference Between Two