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.

Weighted mean

Each grade item can be given a weight, which is then used in the arithmetic mean aggregation to influence the importance of each item in the overall mean.

Each grade within a category (or a category total within a parent) is normalized to a decimal value based on the quotient between the points earned and the maximum ensuring that weights are calculated appropriately.

A1 70/100 weight 10, A2 20/80 weight 5, A3 10/10 weight 3, category max 100:
(0.7*10 + 0.25*5 + 1.0*3)/18 = 0.625 --> 62.5/100

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.

This is the mean that most instructors are used to.

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.

Keep highest and drop lowest values are not calculated using this aggregation method

A1 70/100, A2 20/80, A3 10/10:
70 + 20 + 10 = 100/190