As you all may know, the exam is in 4 days. :x
I was doing this past paper:
GCE June 2011 6PH08 (6b)
In the very first question part (b) there is a calculation for the volume. We are supposed to average the results already in the table. When I did it (for practice) I considered the values 28.2 and 5.94 as anomalies as they seemed to be a bit distant from the other values. It seemed logical.
However in the
marking scheme this is not considered. All five values are taken. When I checked the
examiner's report, it was mentioned about students who used just 4 values and cut out those two as anomalies, not using it in the calculation, but using them in part (c) for an uncertainty calculation. But it is not mentioned whether this is wrong or right, but the examiner has given comments saying "student has done well."
I have two questions:
> What are the criteria for considering a value as an anomaly and exclude in averaging, in the edexcel unit 6 paper?
> When you consider something an anomaly, is it taken in the
half-range/average uncertainty calculation? Is it the correct thing to do?
Much thanks. And good luck to everyone doing the exam!