- #1
DaveC426913
Gold Member
- 22,790
- 6,498
I am checking the accuracy of my speedometer.
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 my speedo? (23/100 = 23% error)
Or as a fraction of my actual? (23/123 = 18.7% error)
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 my speedo? (23/100 = 23% error)
Or as a fraction of my actual? (23/123 = 18.7% error)