FAQ/power/Runpeg42013-03-08 10:17:13localhostconverted to 1.6 markup32008-01-21 15:54:48PeterWatson22008-01-21 15:39:26PeterWatson12008-01-21 15:38:44PeterWatsonSample size for unequal sized groups in an unpaired t-testsDelta is the ratio of group 2 to group 1, pow is the power, alpha is the (two-tailed) type I error, the difference between the means is mdiff with common sd. Group 1 is outputted. NoteL: the power.t.test R function only handles equal sized groups. [COPY AND PASTE INTO R AND, AMEND INPUTS AS DESIRED] [THEN COPY AND PASTE THE BELOW INTO R]