On which scale would equal differences be meaningful but there is no true zero, such as temperature in Celsius?

On which scale would equal differences be meaningful but there is no true zero, such as temperature in Celsius?

• A. Interval Scale
• B. Ratio Scale
• C. Ordinal Scale
• D. Nominal Scale

Answer: (A)

Interval scale means you can measure equal differences consistently, but there is no true zero point. You can add or subtract values and interpret the differences, yet you can’t form meaningful ratios. Celsius temperature fits this: a 10-degree change is the same amount of change anywhere, but 20°C isn’t twice as hot as 10°C because zero degrees doesn’t represent the absence of temperature. Ratio scales, by contrast, have a true zero and allow meaningful ratios (like Kelvin for temperature, or mass). Ordinal scales preserve order only, and nominal scales are just categories without order.

Interval scale means you can measure equal differences consistently, but there is no true zero point. You can add or subtract values and interpret the differences, yet you can’t form meaningful ratios. Celsius temperature fits this: a 10-degree change is the same amount of change anywhere, but 20°C isn’t twice as hot as 10°C because zero degrees doesn’t represent the absence of temperature. Ratio scales, by contrast, have a true zero and allow meaningful ratios (like Kelvin for temperature, or mass). Ordinal scales preserve order only, and nominal scales are just categories without order.