CTU-Bern / presize

Precision Based Sample Size Calculation

Home Page:https://ctu-bern.github.io/presize/

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`prec_alpha` method for Cronbach's alpha

aghaynes opened this issue · comments

Cronbach's alpha method is also defined in

Bonett, D. G. and Wright, T. A. (2015) Cronbach's alpha reliability: Interval estimation, hypothesis testing, and sample size planning, J. Organiz. Behav., 36, pages 3– 15. doi: 10.1002/job.1960.

Describe the solution you'd like
prec_alpha implementing functions 3 and 4 in the appendix. Maybe 2? Plus equivilents to get N given a CI width.