The two-sample t test versus satterthwaite's approximate f test |
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| Authors: | Barry K Moser Gary R Stevens Christian L Watts |
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| Institution: | Department of Statistics , Oklahoma State University , Stillwater, OK, 74078 |
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| Abstract: | A comparison between the two-sample t test and Satterthwaite's approximate F test is made, assuming the choice between these two tests is based on a preliminary test on the variances. Exact formulas for the sizes and powers of the tests are derived. Sizes and powers are then calculated and compared for several situations. |
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| Keywords: | Size power preliminary variance test |
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