power.cor2: Approximates the power of a test for equal correlations in a...

In statpsych: Statistical Methods for Psychologists

Approximates the power of a test for equal correlations in a 2-group design for planned sample sizes

Description

Computes the approximate power of a test for equal population Pearson or partial correlations in a 2-group design for planned sample sizes. Set s = 0 for a Pearson correlation.

Usage

power.cor2(alpha, n1, n2, cor1, cor2, s)

Arguments

alpha	alpha level for hypothesis test
n1	planned sample size for group 1
n2	planned sample size for group 2
cor1	planning value of correlation for group 1
cor2	planning value of correlation for group 1
s	number of control variables

Value

Returns the approximate power of the test

Examples

power.cor2(.05, 200, 200, .4, .2, 0)

# Should return:
#     Power
# 0.5919682

statpsych documentation built on Sept. 11, 2024, 7:42 p.m.