Tagged: GSS Statistical software

How to compare two groups?

How to compare two groups?

Probably one of the most frequently asked questions in statistics is how to compare two groups. We created a video showing a simple example of how to apply Students t-test for this purpose. We compare body height of two groups, women and men. We explain why a t-test is appropriate...

How does a statistical test work? - Part 2

How does a statistical test work? – Part 2

In the last article, we have illustrated the concept of statistical tests. If you only want to obtain a rough understanding of the concept behind statistical tests then reading our last article is absolutely sufficient. However, if you are interested in more detail, then the following will help you to understand how a p-value is calculated and what “degrees of freedom” means.