G Power Statistics Calculator. It contains also a calculator that supports many central and noncentral probability distribu-tions. The software also allows you to generate graphs based on the data you input.
Next GPower needs the following input. It is available for both Windows and Mac. Software Purchasing and Updating.
GPower is free software and available for Mac OS X and Windows XPVista78.
It goes hand-in-hand with sample size. Screenshots click to enlarge. Statistical power is a fundamental consideration when designing research experiments. How to calculate sample sizes for t-tests independent and paired samplesDownload GPower here.
