- #1
utp9
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I am following this: avntraining.hartrao.ac.za/images/Error_Analysis.pdf
I have a ruler with an uncertainty of ± 0.5mm. I made a calculation subtracting one measurement of the ruler, from another measurement, making the uncertainty for the data ± 1.0mm.
As I have four trials, I calculated the mean. Hence, I must calculate the uncertainty of the mean. Using the formula given in the document would the uncertainty be just that, or do I add the rulers uncertainty as well?
Example:
Using the Δxavg formula I get a uncertainty of 0.2 mm (rounded). So would that be my uncertainty? Or, do I add the rulers uncertainty after the first equation, so 1.0 mm to it, to get ± 1.2 mm?
I have a ruler with an uncertainty of ± 0.5mm. I made a calculation subtracting one measurement of the ruler, from another measurement, making the uncertainty for the data ± 1.0mm.
As I have four trials, I calculated the mean. Hence, I must calculate the uncertainty of the mean. Using the formula given in the document would the uncertainty be just that, or do I add the rulers uncertainty as well?
Example:
Using the Δxavg formula I get a uncertainty of 0.2 mm (rounded). So would that be my uncertainty? Or, do I add the rulers uncertainty after the first equation, so 1.0 mm to it, to get ± 1.2 mm?