Before applying any statistical test, it is important to:

• First inspect the data and check that the levels of measurement assigned for each variable are appropriate.
• Select the correct test for the type of variables and check assumptions.

Generally, we can distinguish between two types of statistics:

• Descriptive Statistics
• Inferential Statistics

Within Inferential statistics,

• Correlation tests examine the relationship between two variables and
• Statistical hypothesis testing enables us to examine whether the likelihood of differences (measured by the means) between groups are due to chance.