Dear students,

  I will return exam 1 tomorrow. The average was 75.33 but the standard-deviation as high 22.16. This means that quite a few people
are getting it, but quite a few students don't have the background for this class, and should
consider dropping it and focus on other classes.

But if you want to stay, then you should go over your mistakes and understand what you did wrong.

Here is the break up.
  


                                                                                                                              12, students got, 100

                                                                                                                               6, students got, 97

                                                                                                                               2, students got, 96

                                                                                                                               1, students got, 95

                                                                                                                               2, students got, 93

                                                                                                                               2, students got, 92

                                                                                                                               2, students got, 90

                                                                                                                               2, students got, 88

                                                                                                                               1, students got, 87

                                                                                                                               4, students got, 85

                                                                                                                               1, students got, 83

                                                                                                                               4, students got, 82

                                                                                                                               2, students got, 81

                                                                                                                               4, students got, 80

                                                                                                                               1, students got, 79

                                                                                                                               5, students got, 78

                                                                                                                               2, students got, 77

                                                                                                                               1, students got, 75

                                                                                                                               1, students got, 74

                                                                                                                               1, students got, 73

                                                                                                                               1, students got, 71

                                                                                                                               3, students got, 70

                                                                                                                               3, students got, 67

                                                                                                                               2, students got, 65

                                                                                                                               2, students got, 63

                                                                                                                               1, students got, 60

                                                                                                                               1, students got, 58

                                                                                                                               1, students got, 57

                                                                                                                               4, students got, 55

                                                                                                                               1, students got, 50

                                                                                                                               1, students got, 46

                                                                                                                               2, students got, 43

                                                                                                                               1, students got, 42

                                                                                                                               1, students got, 37

                                                                                                                               1, students got, 33

                                                                                                                               1, students got, 30

                                                                                                                               1, students got, 27

                                                                                                                               1, students got, 20

                                                                                                                               1, students got, 10

                                                                                                                                1, students got, 5