Power on X has been updated to version 1.6.5
Power on X is a tool for the calculation of statistical power (more information on power calculations and Power on X). The program can perform calculations of required sample size to achieve a desired power, and calculations of power for previously run studies/experiments. In addition, the paid version can generate power/sample size tables.
The update has been tested on Mac OS X 10.4 (Tiger) and recompiled using xcode 2.0
Click to download: Power on X
The software is shareware ($30 US, approx. £17 GBP) and can be purchased through this site. A demonstration version can be downloaded. The demo version has a disabled ‘power table’ feature and a ‘nag’ screen.