NOTE:  In reporting the averages from the test we drop
       the lowest scores.  This is because 20% (1 out
       of 5) of all scores will eventually be dropped.
       In comparing your average with the class average
       you need to compare with an average which is
       representative of the final average.  Dropping
       the lowest scores before reporting the average
       is one way of estimating the effect of the
       final drops. GBA

1st test 

   178 students took test 1 

    30 made below 45 

   148 scored 45 or more 

       for those 148 the average was 73.2 

2nd test

   142 students took test 2

    36 made below 40

   106 scored 40 or more

       for those 106 the average was 59.1

3rd test

   130 students took test 3

    30 made below 35

   100 scored 35 or more

       for those 100 the average was 62.3

4th test

   108 students took test 4

    21 made below 35

    87 scored 35 or more

       for those  87 the average was 60.4

5th test

   102 students took test 5

    13 made below 35

    89 scored 35 or more

       for those  89 the average was 62.7

Pre-Exam average

   118 students have taken 4 or more tests

       for those 118 here are the averages:

         HW    6.63  (out of 10, 2 HW's remaining)
         quiz 14.51  (out of 20)
                     (Adams' sections 14.91)
                     (       others   14.15)
         demo  3.85  (out of 5)
         test 59.99  (divide by 2 to get #points)

      overall 54.99

Assuming 2 more HW points for the remaining two turn-in
opportunities and 9 points out of 15 on the final results
in a predicted average of 66.  With this predicted average
a possible breakdown of grades would be:

                    47 - 59   D
                    59 - 73   C
                    73 - 85   B

You should figure your pre-exam total then figure how many
exam points (out of 15 possible) you need to get the grade 
that you want.

Final Average

   104 students took 4 or more tests plus the final exam

       for those 104 here are the averages:

         HW    8.0   (out of 10)
         quiz 15.6   (out of 20)
         demo  4.1   (out of 5)
         test 64.2   (divide by 2 to get #points)

         exam  8.2   (out of 15)

      overall 68.0   (out of 100)

Note that 14 students who had taken four or more tests
elected not to take the final exam.  As a result the quiz,
demo, and test averages for the 104 who took the final 
were higher than the pre-exam averages for those same
categories, and the overall average was higher than the
predicted final average.  Still we felt it would be 
somewhat unfair to raise the predicted cutoffs.  So 
basically we used the predicted grade breakdown with some
small alterations to find the gaps in the grade distribution.  
Here is the final scale:

                    46.7 - 58.9   D
                    58.9 - 73.0   C
                    73.0 - 83.0   B

Letter grades were assigned strictly according to this
scale.  The highest E is 44.5, the lowest D is 46.8;  the
highest D is 57.0, the lowest C is 59.0;  the highest C
is 72.1, the lowest B is 73.2;  the highest B is 81.8,
and the lowest A is 83.1.  The smallest gap between
levels is 1.1 points between C and B.

Here is the final grade distribution for the 104 students
who took the final exam.