I am checking the accuracy of my speedometer.(adsbygoogle = window.adsbygoogle || []).push({});

When my speedo says I'm doing 100km/h, I record an actual speed of 123km/h.

When my speedo says I'm doing 60km/h, I record an actual speed of 68km/h.

I have more data but it corroborates this simple example: error increases with increasing speed.

I will make a chart, but for now...

What is the appropriate way to represent an error like 100 vs. 123?

Do I want to represent it as a fraction of myspeedo? (23/100 = 23% error)

Or as a fraction of myactual? (23/123 = 18.7% error)

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# Representing error: expected versus actual speed

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