We provide additional material for each method to ease the understanding and to improve your learning experience.

Analysis of Variance (ANOVA)

Example | Agriculture
A farmer wants to test the effectiveness of three different fertilizers in relation to soil quality.
Example | Medicine
There are various therapeutic methods to treat a disease. A researcher wants to know whether the different therapies have a different effect on the recovery time and which therapy leads to the fastest recovery.
Example | Business
A manager is testing three different brand names in two different sales channels and wants to determine the effects these two variables have on sales.
Example | Psychology
It is to be investigated whether people with comparable life situations living in rural areas have a different sense of happiness compared to people living in big cities.

ANOVA may be applied if the independent variables are nominal and the dependent variable is metric. This method is particularly important for the analysis of experiments, where the nominal independent variables represent experimental treatments.