Final

Grade Distribution

Part of the homework for CS:2820, Spring 2021
by Douglas W. Jones
THE UNIVERSITY OF IOWA Department of Computer Science

Homeworks/Quizzes — top 10 of 14

                                           X
Mean   = 36.27                             X               X
Median = 36                  X           X X               X           X
                             X   X       X X     X         X           X
                       X   X X   X     X X X     X X     X X           X
       X             X X   X X   X   X X X X X X X X   X X X   X       X
 ______X_X___________X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X___X_X_X_
  16. 18. 20. 22. 24. 26. 28. 30. 32. 34. 36. 38. 40. 42. 44. 46. 48. 50

Machine Problems — top 10 of 12

Note: In the final grade, only the highest 10 scores will count toward the final grade. The remaining low scores will be dropped.

Mean   = 37.60
Median = 40.1                                                    X    
                                           X           X         X    
X                                      X   X   X       X X   X   X X  
X                    X         X       X   X   X     X X X X X X X X X
X                X   X         X   X   X X X   X   X X X X X X X X X X
X____X___________X___X___X_X_X_X___X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X___
  16. 18. 20. 22. 24. 26. 28. 30. 32. 34. 36. 38. 40. 42. 44. 46. 48. 50

Note that machine problem 5, where an extra week was given and the total score was doubled, was graded as two machine problems, MP5 (issues of style and input format) and MP6 (issues of data structure).

The 4 X marks on the left margen are off the scale to the left; these students earned little credit on programming assignments before MP7 and most did not earn any credit on later machine problems.

Total Scores

                                                 X   X
Mean   = 73.88                         X         X   X
Median = 75.5                          X X       X   X           X  
                                       X X       X X X         X X X
                                       X X     X X X X         X X X
 X   X                     X X   X X   X X X   X X X X   X X X X X X     X
 X___X_____________________X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X_X___
  28. 32. 36. 40. 44. 48. 52. 56. 60. 64. 68. 72. 76. 80. 84. 88. 92. 96. 100
             F      |- -   D   + +|- -   C   + +|- -   B   + +|- -   A   + +

The students who failed were the 4 students with scores on the machine problems that were off the left edge of the previous histogram.