- #1
EricVT
- 166
- 6
Hello! I have a question regarding measurement uncertainties. This is not a homework problem.
Let's say that I want to measure some quantity, and I want to measure it multiple times using multiple identical but separate instruments. That is,
-First measurement taken using equipment 'A'
-Second measurement taken using equipment 'B'
-Third measurement taken using equipment 'C'
'A', 'B', 'C' are all the same type of equipment and somehow it is known that they each have the same 'X' % uncertainty in their individual measurements.
Once I have the set of measurements I can look at them individually with their 'X' % uncertainty, or I can look at them as a group. How do I propagate the 'X' % uncertainty in each individual measurement into a group uncertainty?
Of course you could take the results and find a mean value and associated standard deviation, but how does the 'X' % uncertainty come into the picture?
Let's say that I want to measure some quantity, and I want to measure it multiple times using multiple identical but separate instruments. That is,
-First measurement taken using equipment 'A'
-Second measurement taken using equipment 'B'
-Third measurement taken using equipment 'C'
'A', 'B', 'C' are all the same type of equipment and somehow it is known that they each have the same 'X' % uncertainty in their individual measurements.
Once I have the set of measurements I can look at them individually with their 'X' % uncertainty, or I can look at them as a group. How do I propagate the 'X' % uncertainty in each individual measurement into a group uncertainty?
Of course you could take the results and find a mean value and associated standard deviation, but how does the 'X' % uncertainty come into the picture?