Interactive Statistical Calculation Pages. (Updated 03/13/2015 -- Added an entry for MyCurveFit.com -- an easy-to-use nonlinear curve-fitting page.) The web pages listed below comprise a powerful, conveniently-accessible, multi-platform statistical software package. There are also links to online statistics books, tutorials, downloadable software, and related resources. These pages are located on servers all over the world, and are the result of much cleverness and hard work on the part of some very talented individuals. So if you find a page useful it would be nice to send the authors a short e-mail expressing your appreciation for their hard work and generosity in making this software freely accessible to the world.
Table of Contents for this page... Other Statistical Resources... First -- Choose the right test! There are a bewildering number of statistical analyses out there, and choosing the right one for a particular set of data can be a daunting task. Statistical Decision Tree, from the developers of the MicrOsiris package. Package powerSurvEpi. Powergi. PowerSampleSize < Main < Foswiki. PS: Power and Sample Size Calculation version 3.1.6, October 2018 by William D. Dupont and Walton D. Plummer, Jr.Online Help PS is an interactive program for performing power and sample size calculations that may be downloaded for free. It can be used for studies with dichotomous, continuous, or survival response measures. The alternative hypothesis of interest may be specified either in terms of differing response rates, means, or survival times, or in terms of relative risks or odds ratios.
Studies with dichotomous or continuous outcomes may involve either a matched or independent study design. The program can determine the sample size needed to detect a specified alternative hypothesis with the required power, the power with which a specific alternative hypothesis can be detected with a given sample size, or the specific alternative hypotheses that can be detected with a given power and sample size. Downloading and Installing the PS Software Windows Macintosh and Linux Feedback. Package powerpkg.