Author: Viola

How is my data distributed?

Data distributions – How is my data distributed?

Why care about data distribution? Most statistical tests are based on assumptions regarding data distributions. Hence, when we do statistics, we always have to think about how our data is distributed. Normal data distributions A large part of statistics is based on the normal distribution, because it’s so easy to...

How to compare two groups?

How to compare two groups?

When doing statistics analyses, one of the most frequently asked questions will be “is there a difference between two groups?” The two-sample t-test The two-sample t-test is a powerful tool in statistics, that has been developed just for this purpose, i.e. to compare the means of two groups. Imagine you’re...