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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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0.0.0.2 rolling linux/jammy R-4.5 rmass2_0.0.0.2.tar.gz 45.5 KiB
0.0.0.2 rolling linux/noble R-4.5 rmass2_0.0.0.2.tar.gz 45.5 KiB
0.0.0.2 rolling source/ R- rmass2_0.0.0.2.tar.gz 23.5 KiB
0.0.0.2 latest linux/jammy R-4.5 rmass2_0.0.0.2.tar.gz 45.5 KiB
0.0.0.2 latest linux/noble R-4.5 rmass2_0.0.0.2.tar.gz 45.5 KiB
0.0.0.2 latest source/ R- rmass2_0.0.0.2.tar.gz 23.5 KiB
0.0.0.2 2026-04-26 source/ R- rmass2_0.0.0.2.tar.gz 23.5 KiB
0.0.0.2 2026-04-23 source/ R- rmass2_0.0.0.2.tar.gz 23.5 KiB
0.0.0.2 2026-04-09 windows/windows R-4.5 rmass2_0.0.0.2.zip 49.3 KiB
0.0.0.2 2025-04-20 source/ R- rmass2_0.0.0.2.tar.gz 23.5 KiB

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