5A vs. smaller?

[rainmaker]

5A=1103 and up
4A=687-1102
3A=420-686
2A=248-419
1A is broken down further
B=97-248
C=96 and below

Chuck --

None of these categories is rounded, so I'm wondering if it has to do with the enrollments of certain schools. My chemistry teacher in college would always post a list after an exam of all the scores. They always fell into little clumps, and he used these "natural groupings" to establish the curve. He called it a "natural curve" or a "weighted curve". Out of a possible 100, scores would be like 98, 97, 97, 96, 95, 87, 87 ,86, 86, 86, 85, 82, 75, 74, 73, 73, 72, 72, 72, 72 ,71, 71, 71, 62, 61, 58, 51, 44 (and the occasional 23 or such). So on this exam, the top 5 would get A's, next 7 B's, next 11 C's, and everyone else F's. (Our college didn't give D's).

So maybe this enrollment scheme is like the natural curve thing.