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Choosing the appropriate statistical test can be challenging due to the variety of options available. This video discusses seven commonly used tests that involve means, proportions, and relationships. To determine the correct test, consider three key questions: 1) What level of measurement is used for the data (nominal or interval/ratio)? Nominal data, also known as categorical or qualitative, includes examples like color or defective parts, with summary values expressed as frequencies or percentages. The tests applicable for nominal data include tests for proportion and differences between two proportions. 2) The number of samples, and 3) The purpose of the analysis are also essential to identify the right test.