Currently we have 2 strategies which have confusing names: "mean of grades" and "simple weighted mean of grades".

Martin suggests the following replacements:

mean of grades -> Mean of percentages

simple weighted mean of grades -> Mean of original values

Here are the definitions of the 2 strategies:

- Mean of grades
- The sum of all grades divided by the total number of grades.
- A1 70/100, A2 20/80, A3 10/10, category max 100:
`(0.7 + 0.25 + 1.0)/3 = 0.65 --> 65/100`

- 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`