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rmass2: Repeated Measures with Attrition: Sample Sizes and Power Levels
for 2 Groups
For the calculation of sample size or power in a two-group repeated measures design, accounting for attrition and accommodating a variety of correlation structures for the repeated measures; details of the method can be found in the scientific paper: Donald Hedeker, Robert D. Gibbons, Christine Waternaux (1999) <doi:10.3102/10769986024001070>.
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[aut],
Soumya Sahu [aut, cre],
Donald Hedeker [aut]