exp 5 rubric and grading

[robert zellmer]

I sent something about this previously but I'm still getting questions and
I had someone ask questions about the exp 5 rubric concerning the post-lab
and results points.  The post-lab (16 pts) is the grading for having the
correct calculations (based on your input) and the correct s.f. If you get
the s.f. wrong it could make your number off by too much and it will count
it wrong (i.e. it will deduct calculation points).

The results (30 pts) is grading of precision for part A and precision and
accuracy for part B (the correct MW).  These are graded on a sliding scale
depending on how good is your precision and the accuracy of the MW
(compared to the true MW).

*This is done using the numbers calculated by the program based on the**
**experimental data you input, so if that's wrong the program can't get 
correct**
**results.  This grading is based on the numbers calculated by the 
program so**
**if you made calculation errors you can still get points for this part 
based on**
**what the calculated values should be and not your erroneous values. *

There are other exps for which there is date entry based on your data.

I suggest you do all your calculations and enter the numbers on the report
form, or a copy of it, and double check things.  Then go to the data-entry
site (can be reached via Carmen, the syllabus or my web page) and pretty
much just copy over your numbers.

If the data-entry program comes back with points deducted for incorrect
s.f. correct them on the report form (sheet) for the report.  If your 
calculations
were wrong according to the program check to make sure you did them
correctly and correct things for the report sheet.  The data-entry is 
for grading
purposes.  You still need to include the report sheet in your report and 
it should
have correct numbers with correct s.f.

Finally, just in case you don't realize this yet, there's a PDF form of 
the rubric
which pretty much lays things out on one form.  It's a little bit easier 
to see
what you have to do than the Carmen rubric used for grading. This is the 
case
for all experiments.

Dr. Zellmer
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