- #1
lemonysage
- 4
- 0
Hi, I have been given a random set of data. 10 numbers.
121
123
125
100
123
123
101
146
122
140
The question says.
1. Calculate the average of the data... No problem I can do that, my answer is 122.4
2. Determine the uncertainty for the average value. < This is the part that blows my mind. There are literally hundreds of methods for this and I am not sure what to use... My working out so far is as follows:
Using the information in this link.
http://virgo-physics.sas.upenn.edu/uglabs/lab_manual/Error_Analysis.pdf
It says.
The uncertainty in the each measurement is (Max-min)/2
The uncertainty in the the average = uncertainty in each measurement/(sqrt(N))
which is 23/(sqrt10) = 7.27 or 7.
answer to the whole question = 122 +/- 7
Am I thinking about this correctly? or missing it completely?
121
123
125
100
123
123
101
146
122
140
The question says.
1. Calculate the average of the data... No problem I can do that, my answer is 122.4
2. Determine the uncertainty for the average value. < This is the part that blows my mind. There are literally hundreds of methods for this and I am not sure what to use... My working out so far is as follows:
Using the information in this link.
http://virgo-physics.sas.upenn.edu/uglabs/lab_manual/Error_Analysis.pdf
It says.
The uncertainty in the each measurement is (Max-min)/2
The uncertainty in the the average = uncertainty in each measurement/(sqrt(N))
which is 23/(sqrt10) = 7.27 or 7.
answer to the whole question = 122 +/- 7
Am I thinking about this correctly? or missing it completely?