Which statement best describes ratio data?

Which statement best describes ratio data?

• A. Contains a true zero
• B. No true zero
• C. Differences cannot be measured
• D. Ratios are not meaningful

Answer: (A)

Ratio data is the level of measurement that has equal intervals between values and a true zero point, meaning zero represents the absence of the quantity. This setup lets you perform both meaningful differences and meaningful ratios, such as saying one value is twice another. Because there is a true zero, multiplication and division make sense on the scale. That’s why containing a true zero is the best description. If there were no true zero, you’d be dealing with an interval scale, where you can compare differences but not form meaningful ratios (for example, Celsius temperature). The idea that differences cannot be measured or that ratios aren’t meaningful doesn’t fit ratio data, since both differences and ratios are interpretable when a true zero is present.

Ratio data is the level of measurement that has equal intervals between values and a true zero point, meaning zero represents the absence of the quantity. This setup lets you perform both meaningful differences and meaningful ratios, such as saying one value is twice another. Because there is a true zero, multiplication and division make sense on the scale.

That’s why containing a true zero is the best description. If there were no true zero, you’d be dealing with an interval scale, where you can compare differences but not form meaningful ratios (for example, Celsius temperature). The idea that differences cannot be measured or that ratios aren’t meaningful doesn’t fit ratio data, since both differences and ratios are interpretable when a true zero is present.