Can age be a interval variable? - Answers

Age can be considered an interval variable when it is measured in a continuous scale, such as years or months, where the differences between values are meaningful and consistent. However, it is more commonly treated as a ratio variable because it has a true zero point (birth), allowing for meaningful comparisons of magnitude. In certain contexts, age can also be categorized into intervals (e.g., age groups), but as a standalone measurement, it typically functions as a ratio.