size.ci.cronbach: Sample size for a Cronbach reliability confidence interval

In statpsych: Statistical Methods for Psychologists

Sample size for a Cronbach reliability confidence interval

Description

Computes the sample size required to estimate a Cronbach reliability with desired confidence interval precision. Set the reliability planning value to the smallest value within a plausible range for a conservatively large sample size.

Usage

size.ci.cronbach(alpha, rel, r, w)

Arguments

alpha	alpha value for 1-alpha confidence
rel	reliability planning value
r	number of measurements
w	desired confidence interval width

Value

Returns the required sample size

References

\insertRef

Bonett2015statpsych

Examples

size.ci.cronbach(.05, .85, 5, .1)

# Should return:
# Sample size
#          89
 

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