We have a large (2000+) set of numbers that we are assigning grades to.
This is the logic
But no matter how many different data sets I use, grades fall into A, C, or F, i.e.
I understand that A has a large range, i.e. anything less than <85 and so does F, i.e anything greater than 115%
Whereas B, C, D have range of 10 points. But if that's the case, are some locations being graded as C?
To me, something seems amiss.
Is there some sort of mathematical phenomena (such as Birthday Paradox, where if you get 23 people in a room, two of them have same birthday)?
This has been puzzling me for over a week.
Update
I believe I implemented the formula correctly, so this question is a mathematical one
Here is screenshot
