size.test.cronbach2: Sample size to test equality of Cronbach reliability...

In statpsych: Statistical Methods for Psychologists

Sample size to test equality of Cronbach reliability coefficients in a 2-group design

Description

Computes the sample size required to test a difference in population Cronbach reliability coefficients with desired power in a 2-group design.

Usage

size.test.cronbach2(alpha, pow, rel1, rel2, r)

Arguments

alpha	alpha level for hypothesis test
pow	desired power
rel1	group 1 reliability planning value
rel2	group 2 reliability planning value
r	number of measurements (items, raters)

Value

Returns the required sample size per group

References

\insertRef

Bonett2015statpsych

Examples

size.test.cronbach2(.05, .80, .85, .70, 8)

# Should return:
#      Sample size per group
# [1,]                    77
 

statpsych documentation built on July 9, 2023, 6:50 p.m.