SamplePower 3

SamplePower 3, developed by SPSS Inc., is a stand-alone application for power and sample size analysis. It helps researchers design statistically sound studies by estimating the number of participants required to detect effects of interest and by evaluating the power of planned analyses. You can run quick what-if scenarios, visualize power curves, and compare alternative designs before collecting data, reducing the risk of underpowered or unnecessarily costly studies.

Key capabilities include:

• Broad test coverage, including means (t tests and ANOVA), proportions, correlations, chi-square tests, and linear regression.
• Guided workflows and ready-made scenarios that simplify setup and reduce guesswork.
• Flexible inputs for effect size, alpha, variance, allocation ratios, and anticipated attrition.
• Clear tables and charts suitable for reports and stakeholder communication.
• Complementary use with SPSS Statistics (no dependency required).

SamplePower 3 is designed for researchers, analysts, and students who need a practical, reliable way to plan studies and justify methodological decisions with transparent, data-driven assumptions.

SamplePower 3 is developed by SPSS Inc. and is used by 1 user of Software Informer. The most popular version of this product among our users is 3.0. The names of program executable files are NewShortcut5_22A29F33EBED4CE9BBF9117C23B7DB57.exe, SamplePower.exe.