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Size and Power of Tests for Equality of Means of Two Normal Populations with Unequal Variances

✍ Scribed by Lee, Austin F. S.; Gurland, John


Book ID
120073237
Publisher
American Statistical Association
Year
1975
Tongue
English
Weight
757 KB
Volume
70
Category
Article
ISSN
0162-1459

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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