Statistical tests are used in hypothesis testing. They can be used to: determine whether a predictor variable has a statistically significant relationship with an outcome variable. estimate the difference between two or more groups.

Why are statistical tests important?

A statistical test provides a mechanism for making quantitative decisions about a process or processes. The intent is to determine whether there is enough evidence to "reject" a conjecture or hypothesis about the process.

What are the things to consider in choosing a statistical test?

Three criteria are decisive for the selection of the statistical test, which are as follows: the number of variables, types of data/level of measurement (continuous, binary, categorical) and. the type of study design (paired or unpaired).