CHES (Certified Health Education Specialist) Practice Exam 2026 – Your All-in-One Guide to Exam Success!

Question: 1 / 400

Among the levels of measurement, which allows for the measurement of true ratios?

Nominal level measures

Ordinal level measures

Interval level measures

Ratio level measures

The ratio level of measurement is the most advanced type among the four levels—nominal, ordinal, interval, and ratio. It possesses all the characteristics of the other levels, but it uniquely provides a true zero point, which indicates the absence of the quantity being measured. This true zero allows for meaningful comparisons involving multiplication and division.

For example, with ratio measures, you can state that one value is twice as much as another because of the true zero point, such as measuring weight or height. In contrast, nominal levels categorize data without any quantitative value, ordinal levels give a rank order but do not specify the distance between ranks, and interval levels allow for ordered data with equal distances but lack a true zero. Therefore, only the ratio level enables the assessment of true ratios in measurements.

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