Parametric statistics require the level of data measurement to be ordinal or interval.

Question

Quizplus · Accepted Answer

Parametric statistics typically require interval or ratio level of measurement because they assume the underlying data distributions are normal, and these levels of measurement support the arithmetic operations and assumptions necessary for parametric tests. Ordinal data, which merely ranks items without implying equal distances between ranks, generally does not meet the requirements for parametric statistical tests.

Parametric Statistics Require the Level of Data Measurement to Be