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Statistics decision tree

An Android application which mirrors the function's on this page is available from here on the Android Market Place / Google Play.

Purpose of this page

This simple decision tree is designed to help you to choose which test to use when analysing your data.

To find the sample size needed to detect the effect you expect to see read the book Statistical Power Analysis for the Behavioural Sciences by Jacob Willem Cohen.

To find out more about these tests read Statistical and data handling skills in biology by Roland Ennos this book is designed of biologist and is easy to understand (and only 129 small easy to read pages).

Question 1

Are you measuring things (e.g. length or counts per second) or counting the numbers of each type in a group (number of males in a group versus number of females in the group)?