Students, who study some subject about statistics, have often problems with choosing a proper statistical test for their task. To select a proper test, you need to consider following facts:

• the hypothesis which you need to test,
• the structure of your data (do you have one sample from one population, two samples from two populations, or even more?),
• your knowledge about population(s) (like population distribution type, variance etc.).

I have created a decision tree in iBokse application to make these decisions easier for you. You can open the tree by clicking on a picture below.