Elementary Math Models -- Fall 2017

Results for Exam 2

This webpage will give an overview of how the class performed as a
whole on the exam. You can find your individual score posted on Blackboard. When you
get the exam back in class, double check that the score on your paper
is the same as what is recorded on blackboard. Also, add up your
points for the entire exam and double check that I have the right total
for your paper. I am very careful totalling and recording scores,
but mistakes CAN occur.

Grading Comments. Everyone
should receive a sheet of comments about specific errors on the
exam.
These should be helpful when you are working on the exam
solutions. If you do not receive one, or need an extra copy, it
is available
here: http://www.dankalman.net/AUhome/classes/classesF15/emm/exam2/exam2notes.pdf.

Class Performance. The first histogram below shows all of
the
scores for the second exam. The scores are rounded to the
nearest whole number (with scores of the form xx.5 rounded up), so if you got an 86.5 that
would appear as an 87
on the graph. The graph shows 11 scores of 90 or above, 12 scores
in the
80s, and 4 in the 70s. The
second histogram
shows each
student's exam average for the two exams we have completed.
Almost every one is on track to
earn a
B or better
in the course at this point, and no one appears to be at great risk for
a
grade below C right now. But as we progress in the material, it
will
continue to get harder. So if your exam average is below 75,
especially if your score went down on the second exam, you should
probably
be thinking about ways to improve. It might
be a good idea to come see me in my office in the next week or so to
discuss
the exam results. More generally, anyone who is
dissatisfied with his or her score on the exam is invited to see me
about it.

**Impressions of class performance. **Scores on the multiple
choice items were lower than they should be for a course
like this. I suspect that this reflects, at least in part, the
novelty of being asked to understand mathematical ideas both verbally
and conceptually to so great an extent. It is difficult to know
whether an incorrect multiple choice answer means that the student did
not understand the concept, or that he/she didn't understand the
wording of the question, or made an error marking the answer, or
something else. The mathematical skills questions show that most
of
the class has quite a solid command of the procedures that we have
covered. I encourage everyone to put greater emphasis on
extracting important ideas from the reading, just as you would in a
course in say history or philosophy. It is a useful skill to be
able to identify and master important concepts, and to be able to write
coherently and concisely about them. Beyond that, because
terminology in math has a very specific meaning, if you do not know the
terminology clearly and correctly, the lectures and the reading will
not make complete sense to you.

**Looking Ahead.**
I will be returning the exams on Tuesday, 10/17/17. Group Exam
solutions will be due on 10/24/17. Please
review the instructions.
We will be
going on to section 3.3 next.