samplesize (version 0.1-7)

n.indep.t.test.eq: Sample size for independent Student's t-test with equal group size

Description

Function computes sample size for Student's independent t-test with equal group size

Usage

n.indep.t.test.eq(power = 0.8, alpha = 0.95, mean.diff = 0.8, sd.est = 0.83)

Arguments

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

Value

• sample size
  sample size in each group

References

Bock J., Bestimmung des Stichprobenumfangs fuer biologische Experimente und kontrollierte klinische Studien. Oldenbourg 1998

See Also

n.indep.t.test.neq(), n.paired.t.test(), n.welch.test()

Examples

n.indep.t.test.eq(power = 0.8, alpha = 0.95, mean.diff = 0.8, sd.est = 0.83)