Another Update: Mastering problem in Homework Review Ch 1c (1.6), problem 1.73

[Zellmer, Robert]

I sent the following about skipping Parts D and E and answering Part F.  People
have been asking how to "skip" D and E.  Simply click on "Request Answer".
That will give you the answer and allow you to go to the next part.  That's the
easiest way to "skip" these parts.

Pearson fixed this problem.  However, it will not apply to us.  Their system isn't
equipped to make changes in grading after people have started the homework.
I would have to delete everyone's attempts and have everyone start over.

Sometime after Saturday I will go back and give credit to everyone for these parts.

Dr. Zellmer

From: Zellmer, Robert <zellmer.1 at osu.edu>
Sent: Wednesday, August 31, 2022 8:01 AM
To: cbc-chem1210 at groups.asc.ohio-state.edu
Cc: cbc-chem1210-ta at groups.asc.ohio-state.edu
Subject: Update: Mastering problem in Homework Review Ch 1c (1.6), problem 1.73

Pearson has updated this question.  However, it's not easy to make it retroactive.
Skip Parts D and E and after the due date I will go back and give credit for these
parts to everyone.  Do Parts A-C, calculate the deviations and average deviations
for Parts D and E.  You can use them to answer part F.

Here's an example.  The numbers will likely be different than the ones you got
since they're randomly generated.

For Part D, my data is 34.43, 34.40, 34.45, the avg. is 34.43.  The absolute values of the
deviations are 0.00, 0.03, 0.02 (subtract each number from the average and take the
absolute value).  Then calculate the average of these deviations.  For my numbers, the
average deviation is 0.05/3 = 0.01666 = 0.02.

For Part E, my data is 34.52, 34.55, 34.49, the avg. is 34.52.  The absolute values of the
deviations are 0.00, 0.03, 0.03 and the average deviation is 0.06/3 = 0.02 .

When you compare the avg. dev. of the two data sets look at the unrounded averages.
You can see for this data, the avg dev for set 1 is a little smaller than for set 2 so set 1
is more precise.  You can see this in the deviations themselves, for set 1 they're closer
to each other.

Dr. Zellmer


From: Zellmer, Robert <zellmer.1 at osu.edu<mailto:zellmer.1 at osu.edu>>
Sent: Monday, August 29, 2022 4:20 PM
To: cbc-chem1210 at groups.asc.ohio-state.edu<mailto:cbc-chem1210 at groups.asc.ohio-state.edu>
Cc: cbc-chem1210-ta at groups.asc.ohio-state.edu<mailto:cbc-chem1210-ta at groups.asc.ohio-state.edu>
Subject: Mastering problem in Homework Review Ch 1c (1.6), problem 1.73

In Homework Review Ch 1c (1.6) problem 1.73 there's a mistake in Parts D and E
of this question for the answers.  It doesn't seem to be giving the correct answer.
Enter your answer as you've done it.  If it states it's wrong just move on.  I've sent
something to Pearson.

I'll figure out later how I'll take care of those parts.

Dr. Zellmer
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