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This web-page gives you a brief overview of statistics. You will find lots of links from this web-page to other web-pages providing more information. (Another page describes how to chose…

LATEST EDIT: 1st of October 2026 - An online calculator for the Holm- Šidák method to adjust for multiple testing was added.

This web-page provides an introduction to the concept of etiologic predictive value (EPV). Reading this webb page will give you an understanding of the concept EPV and how to use…

This web-page provides an introduction to the software G*Power used to estimate sample size. Reading this will give you enough knowledge to be able to try doing simple things in…

This web-page describes how to properly round up figures when you want to present your results. It is all about understanding the concept of precision. Reading this will give you…

This web page describes the most important cornerstones of Western philosophy of science. It is not complete and, if necessary, will be supplemented and revised. Philosophy of science is based…

Reading this page will give you an understanding of what standard (classical) linear regression is and how to perform the analysis in the statistical software SPSS (the process is similar…

Suggested pre-readingWhat this web page adds Introduction to statistics Observations and Variables This web-page describes the utterly important process of cleaning data before commencing descriptive or inferential statistical analysis. Data usually…

Reading this web site and watching the embedded videos will help you get started with using the statistical software IBM SPSS. Recommended prereading are the pages Introduction to statistics, Observations…