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	reliability planning value for group 1
rel2	reliability planning value for group 2
r	number of measurements (items, raters)

Value

Returns the required sample size for each group

References

\insertRef

Bonett2015statpsych

Examples

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

# Should return:
# Sample size per group
#                    77
 

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