Category aggregation

This menu lets you choose the aggregation strategy that will be used to calculate each participant's overall grade for this category. The different options are explained below.

The grades are first converted to percentage values (interval from 0 to 1, this is called normalisation), then aggregated using one of the functions below and finally converted to the associated category item's range (between Minimum grade and Maximum grade).

Important: An empty grade is simply a missing gradebook entry, and could mean different things. For example, it could be a participant who hasn't yet submitted an assignment, an assignment submission not yet graded by the teacher, or a grade that has been manually deleted by the gradebook administrator. Caution in interpreting these "empty grades" is thus advised.

Simple weighted mean
The difference from Weighted mean is that weight is calculated as Maximum grade - Minimum grade for each item. 100 point assignment has weight 100, 10 point assignment has weight 10.
A1 70/100, A2 20/80, A3 10/10, category max 100:
(0.7*100 + 0.25*80 + 1.0*10)/190 = 0.526 --> 52.6/100

Sum of grades
The sum of all grade values. Scale grades are ignored. This is the only type that does not convert the grades to percentages internally (normalisation). The Maximum grade of associated category item is calculated automatically as a sum of maximums from all aggregated items.
A1 70/100, A2 20/80, A3 10/10:
70 + 20 + 10 = 100/190

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