Quote:
Originally Posted by starfish
For the purposes of awards and average calculating, McMaster considers a 9.5 average to be equivalent to an 80.
I have no idea how you came up with 9.5 = 79.5%. If you were averaging, you'd say a 9 runs from 77-79.9, so then taking the midpoint of that is 78.45%...but it's still not accurate, you can't convert properly that way. Two people can have the same CA on the 12-point scale, but they probably don't have the same average on the percentage scale if you actually knew all of the individual marks to calculate it properly.
I always just assumed that calling 9.5 an 80 was reflecting the fact that the 12-point system lowers your average compared to the 12-point system because higher grade points encompass a wider range of percentages than lower grade points.
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What I was referring to is the fact that EACH percentage point between a grade has a range
Ie. 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9-10, 10-11, 11-12
And by using 6-7 and 9-10 as example:
6-7 = 69-70% which would include values 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.9, 7.0
Each of those GPAs would be: 69.1%, 69.2%, 69.3%, 69.4%, 69.5%, 69.6%, 69.7%, 69.8%, 69.9% and 70%
So as you can see if you realize that McMasters GPA scale uses 1 decimal place and there can be 9 different point values to account for before rounding.
9.5 is technically 79.5%, and can only really be an 80% average if you round the point 5
The registrar uses your actual mark values to calculate your GPA so the 12pt scale is valid and accurate some people just don't know how the decimal part works
Edit: to make things clearer 9.5 = 79.5% because 9 comes before 9.5 and after 10
79 - 79.5 - 80