Computes the sample size required to test equality of two Pearson or partial correlation with desired power in a 2-group design. Set s = 0 for a Pearson correlation.

size.test.cor2(alpha, pow, cor1, cor2, s)

Arguments

alpha

alpha level for hypothesis test

pow

desired power

cor1

planning value of correlation

cor2

planning value of correlation

s

number of control variables

Value

Returns the required sample size per group

Examples

size.test.cor2(.05, .8, .4, .2, 0)
#>      Sample size per group
#> [1,]                   325

# Should return:
#      Sample size per group
# [1,]                   325