Pairwise Multiple Comparison Procedures with Unequal N’s and/or Variances: A Monte Carlo Study
- 1 June 1976
- journal article
- Published by American Educational Research Association (AERA) in Journal of Educational Statistics
- Vol. 1 (2), 113-125
- https://doi.org/10.3102/10769986001002113
Abstract
Three different methods for testing all pairs of yȳk, - yȳk’ were contrasted under varying sample size (n) and variance conditions. With unequal n’s of six and up, only the Behrens-Fisher statistic provided satisfactory control of both the familywise rate of Type I errors and Type I error rate on each contrast. Satisfactory control with unequal n’s of three and up is dubious even with this statistic.Keywords
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