If the sample size for a t-test is calculated on the basis of a prior estimate of the variance then the power of the test at the treatment di!erence of interest is not robust to misspeci"cation of the variance. We propose a t-test for a two-treatment comparison based on Stein's two-stage test which
โฆ LIBER โฆ
On the Use of the Upper Confidence Limit for the Variance from a Pilot Sample for Sample Size Determination
โ Scribed by Dr. Meinhard Kieser; Dr. Gernot Wassmer
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 451 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0323-3847
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