Testing equality of two normal means usi
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Willem Albers; Pieta C. Boon; Wilbert C.M. Kallenberg
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Article
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1998
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Elsevier Science
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English
โ 399 KB
Since the two-sample t-test presupposes equality of variances, often a preliminary F-test is advised to check this assumption. However, very large sample sizes are necessary before this procedure behaves in a satisfactory manner. In the present note this phenomenon is explained using second-order as