Test 2 results and scale

Here is some information on scores for test 2. It should be useful in interpreting your score.

First, some descriptive statistics:

mean = 28.475 out of 40 possible points (71.19%)
median = 28 (70%)
mode = 30 (75%)
standard deviation = 5.4 points (13.5%)

So, you can use the following scale as a guide for interpreting your score:

A: 33.5 and higher (3)
B: 28 to 33 (7)
C: 22 to 27.5 (8)
D: 17 to 21.5 (1)
F: 16.5 and below (1)

The number in parentheses is the frequency of observations in that range.

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The grade distribution at the halfway mark:

On your score sheet there is a number written in red ink between the value of 0 and 47. That figure is the number of points you have earned up through the second test and 4th homework.

To see how that figure is calculated, you need to see the information on the syllabus.

Each test is worth 20 percentage points. To calculate how many of those 20 you've actually earned, you take your test score (the raw score) and divide it by 40 (the total possible points). That will yield a value between 0 and 1. Multiply that by 20 to get the points out of 20.

e.g., if you got a 30 out of 40 on the first test, the amount of the 20 points you get is:

(30/40) x 20 = .75 x 20 = 15. If you got 40 out of 40 you get all 20 points.

So do that for both tests. Then add your points on the 4 homework assignments. Problem sets 1 and 4 were scored out of 2 points, problem sets 2 and 3 were scored out of one. Maximum homework points so far is 6 points. Then include one (1) participation credit point if you were in class on July 15 (the day after the first test). In an earlier blog post it was noted that those in attendance that day get one point (out of the possible 5) of participation credit.

So total possible points earned so far is 47.

You need to convert your points to a percentage. Take your points so far (in the red ink) and divide by 47 (then multiply by 100 to put into percent).

Use the following scale (in terms of percent) to see what your projected grade is at this point.

A: 84% and higher
B: 73 - 83.9%
C: 62 - 72.9%
D: 51 - 61.9%
F: below 51%

This is based on an average of 73.2% and a standard deviation of 11.1%.

Good luck with the remainder of the course.