calculating absolute and percentage error in temperature measurement?

Not sure how to do this, anyone got any ideas?

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• Bert K
Lv 7
10 years ago

Absolute Error is when you subtract the accepted value from your measured value…

Absolute Error = Measured Value - Accepted Value

* A positive answer means you are over the accepted value.

* A negative answer means you are under the accepted value

Percentage Error is the most common way of measuring an error, and often the most easy to understand.

Percentage Error = Absolute Error / Accepted Value

So, if you measured a pencil to be 102mm long, and an independent lab with high tech equipment measured it as 104mm, the percentage error is…

Percentage Error = (102mm - 104mm) / (104mm) = -0.02

Which means you got a -2% error. The minus sign just means that you were under the accepted value.

In high school labs, don’t be surprised if you obtain errors of 25%. The important part is, can you explain your errors!

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• 3 years ago

Percent Error Calculation