Physics May/June 2009 paper 3B
Section B, Question 6
It says (for the people who dont have it):
An engineer carried out an investigation to determine the Young modulus of a sample of a material.
(b) The engineer obtained three sets of data. The values for the Young modulus were 14.2, 14.7 and 15.1 GPa.
Determine the average value and state its uncertainty.
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The average value is 14.7, but what's the uncertainty ? And please elaborate how did you calculate it?