Feedback: The precise determination of sample size in evaluation studies
β Scribed by Michalczyk, Alan ;Lewis, Lloyd
- Book ID
- 112169101
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1981
- Weight
- 369 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0273-5326
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π SIMILAR VOLUMES
This paper outlines methods of determining sample size for epidemiologic research in studiea of the etiologic fraction. The basic model with a dichotomous disease and a single dichotomous expo aure factor is considered. To determine sample size. the reeearcher must specify: the magnitude of the etio
## Abstract NOETHER (1987) proposed a method of sample size determination for the WilcoxonβMannβWhitney test. To obtain a sample size formula, he restricted himself to alternatives that differ only slightly from the null hypothesis, so that the unknown variance o^2^ of the MannβWhitney statistic ca