I would assume a normal distribution where 68% of the population land between 85 and 115. Or a movement of .4 SD. [0] Nearly 16% of people would lie between 97

I would assume a normal distribution where 68% of the population land between 85 and 115. Or a movement of .4 SD. [0] Nearly 16% of people would lie between 97 and 103. [1] It's 40% of a full letter grade[2] [0]http://en.wikipedia.org/wiki/Standard_deviation http://en.wikipedia.org/wiki/Standard_deviation [1]http://www.wolframalpha.com/input/?i=area+e%5E%28-1%2F450+%28-100%2Bx%29%5E2%29%2F%2815+sqrt%282+%CF%80%29%29%2C+x%3D97+to+103 http://www.wolframalpha.com/input/?i=area+e%5E%28-1%2F450+%2... [2]http://en.wikipedia.org/wiki/Academic_grading_in_the_United_States#Rank-based_grading http://en.wikipedia.org/wiki/Academic_grading_in_the_United_...