[R] power.t.test

Hank Stevens HStevens at muohio.edu
Mon Mar 31 22:42:49 CEST 2003

power.t.test() requires a standard deviation as input, but for a two sample 
test, I do not understand what is required. Is it the standard deviation of 
the means (standard error), or of the combined sample?

Hank Stevens

Martin Henry H. Stevens, Assistant Professor
338 Pearson Hall
Botany Department
Miami University
Oxford, OH 45056

Office: (513) 529-4206
Lab: (513) 529-4262
FAX: (513) 529-4243

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