Software for power and sample size calculations
Numerous free and/or open source programs are available for performing power and sample size calculations. These include:
- G*Power (http://www.gpower.hhu.de/)
- powerandsamplesize.com Free and open source online calculators
- PS
- PowerUp! provides convenient excel-based functions to determine minimum detectable effect size
and minimum required sample size for various experimental and quasi-experimental designs. - R package pwr
- Russ Lenth’s power and sample-size page
- WebPower Free online statistical power analysis (http://webpower.psychstat.org)
- SampSize app for Android and iOS iPhone and iPad (https://www.epigenesys.org.uk/portfolio/sampsize/)