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Unformatted text preview: the FTable, which contains the critical values for the righttail probabilities only. However, one might use the following nice property of Fdistribution that: F 1, 2, 1 = 1 / F 2, 1, to obtain the critical values for the lefttail probabilities. Here is a numerical example: F 2, 3, 0.9 = 1 / F 3, 2, 0.1 = 1 / 9.16 = 0.109 You need both tails probabilities for test of hypothesis and construction of confidence interval for the ratio of two independent populations' variances. You might like to use FDensity Function to obtain its Pvalues....
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 Spring '08
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