Exam 1 statistics
*****************

N              =   15
Average        =   189
Stand Deviation=   40
Median         =   200

Exam 2 statistics
*****************

N              =   15
Average        =   160
Stand Deviation=   51
Median         =   163


Definitions
===========
Average         =  Sum of grades divided by number of exams
Stand Deviation =  Shows dispersion of grades. Roughly, 2/3 of the grades are
                   within 89 +/- 26 , and 95% within  89 +/-  2*26 if average is 89
                   and standard deviation is 26.
Median          =  Half of the students got that much or less (and half more than that).