n.indep.t.test.eq {samplesize} | R Documentation |
Function computes sample size for Student's independent t-test with equal group size
n.indep.t.test.eq(power = 0.8, alpha = 0.95, mean.diff = 0.8, sd.est = 0.83)
power |
required power 1-beta |
alpha |
required Level I-error 1-alpha |
mean.diff |
required minimum difference between group means |
sd.est |
standard deviation in groups |
sample size |
sample size in each group |
Ralph Scherer
Bock J., Bestimmung des Stichprobenumfangs fuer biologische Experimente und kontrollierte klinische Studien. Oldenbourg 1998
n.indep.t.test.neq(), n.paired.t.test(), n.welch.test()
n.indep.t.test.eq(power = 0.8, alpha = 0.95, mean.diff = 0.8, sd.est = 0.83)