Summary: AGP or EGP as Mean Grade determinant
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AGP be retained.
Effort Grade Points (EGP) tallying method rewards extra effort.
EGP = 7 * candidate's_all_subjects_sat_average
EGP can help above-average students best(verb) their mean grade (MG).
All other students, with varying academic strengths, can also improve their MG using EGP.
'E' students have 16.67% chance of MG upgrades i.e. 'power of mercy' on 33,399 E's from KCSE 2016 class.
'A-' achiever has 1.19% chance to best(verb) MG.
D+ chance of MG upgrade is 36.21%.
C- or D have each a probability 33.33% of improving their MG.
Mean Grade would be determined by either AGP or EGP, whichever is better or higher.
The 8th subject score or grade, which is currently unconsidered in MG determination, can be the mean grade changer.