Computes the sample size required to test a Cronbach reliability with
desired power.
Usage
size.test.cronbach(alpha, pow, rel, r, h)
Arguments
- alpha
alpha level for hypothesis test
- pow
desired power
- rel
reliability planning value
- r
number of measurements
- h
null hypothesis value of reliability
Value
Returns the required sample size
References
Bonett DG, Wright TA (2015).
“Cronbach's alpha reliability: Interval estimation, hypothesis testing, and sample size planning.”
Journal of Organizational Behavior, 36(1), 3–15.
ISSN 08943796, doi:10.1002/job.1960
.
Examples
size.test.cronbach(.05, .85, .80, 5, .7)
#> Sample size
#> 139
# Should return:
# Sample size
# 139