Exam 1 statistics Exam 2 statistics ***************** ***************** (reported on (reported on N = 27 N = 25 Average = 228 Average = 164 Stand Deviation= 54 Stand Deviation= 72 Median = 239 Median = 158 275 - 300 : 6 250 - 275 : 6 225 - 250 : 5 200 - 225 : 5 0 - 200 : 5 Qz 1 statistics Qz 2 statistics ***************** ***************** (reported on 9/27/2011) (reported on 10/10/2011) N = 24 N = 26 Average = 74 Average = 70 Stand Deviation= 21 Stand Deviation= 16 Median = 77 Median = 71 Qz 3 statistics Qz 4 statistics ***************** ***************** (reported on (reported on 10/21/2011 N = 24 N = 23 Average = 62 Average = 64 Stand Deviation= 22 Stand Deviation= 23 Median = 60 Median = 65 Qz 5 statistics ***************** (reported on 12/7/2011) N = 22 Average = 73 Stand Deviation= 26 Median = 80 Definitions Definitions =========== =========== Average = Sum of grades divided by number of exams Stand Deviation = Shows dispersion of grades. Roughly, 2/3 of the grades are within 76 +/- 23 , and 95% within 76 +/- 2*23 Median = Half of the students got that much or less (and half more than that).