Definition:Linear Interval Scale/Warning
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Definition
It makes no sense to discuss multiples of values on a linear interval scale.
Thus, for example, to say that a temperature of $20 \cels$, measured on the celsius scale, is twice as hot as a temperature $10 \cels$ is meaningless.
On the Fahrenheit scale, these temperatures are $68 \fahr$ and $50 \fahr$ respectively, which immediately shows up the fallacious nature of that reasoning.
Also see
- Results about linear interval scales can be found here.
Sources
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): scales of measurement