size.test.cor {statpsych}

Sample size for a test of a Pearson or partial correlation

Description

Computes the sample size required to test a population Pearson or a partial correlation with desired power. Set s = 0 for a Pearson correlation.

Usage

size.test.cor(alpha, pow, cor, s, h)

Arguments

alpha

alpha level for hypothesis test

pow

desired power

cor

planning value of correlation

s

number of control variables

h

null hypothesis value of correlation

Value

Returns the required sample size

Examples

size.test.cor(.05, .9, .45, 0, 0)

# Should return:
# Sample size
#          48