samplesize.h: Sample size estimation in the differences between proportions
Description
samplesize.h determines the sample size, when specified the effect size to be detected, desired statistical power, and significance level.
samplesize.h always specifies two-sided test.
Usage
samplesize.h(delta, power = 0.8, sig.level = 0.05)
Arguments
delta
a numeric contains the effect size (Cohen's $h$) to be detected
power
a numeric contains the desired statistical power (default 0.80)
sig.level
a numeric contains the significance level (default 0.05)
Value
Return a numeric containing the appropriate sample size in each group.
encoding
UTF-8
References
Cohen J (1988). Statistical power analysis for the behavioral sciences (2nd ed). Hillsdale, NJ: Erlbaum.