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 [1]http://www.wolframalpha.com/input/?i=area+e%5E%28-1%2F450+%2... [2]http://en.wikipedia.org/wiki/Academic_grading_in_the_United_...