[Feature Request] Use median GPA instead of Mean

[AbhiramTadepalli]

Overview

The median GPA is closer to the bulk of the data, and is less affected by skew. This also might mean most of the letter grades will not be a B -> easier to tell apart. Median also (from preliminary research) seems to represent the shape of the graph better.

Proposal

Consider using the median GPA instead of the mean/average in all places (Letter grade, distribution graphs, compare table, new line graph)

Supplementary Information

Open to debate, but do some mockups first

[AbhiramTadepalli]

I want to first just use it on LHS so we can compare how the avg letter grade maps to the graph vs median letter grade