apologies...

I wish to apologize to those students who tried to pick up their test on Monday (3/24) after class and I could not track them down. Of course I found them minutes after you all left (they were in that Aeropostale bag laying on the floor by my bookcase).

I will try to remember to bring your scored exams to class on Wednesday.

Please see the blog posts below to see the distribution of test scores and midterm grades.

JJ

Section 9 (TR class)--Test 2 and Midterm Grades

Here is the grade/curve distribution for Test 2:

Average: 26.11 out of 40 points (65.27%)
Median: 26
Mode: 26.5
Std deviation: 4.98

This gives the following as an approximate grade scale:

A: 34 and higher
B: 27.5 to 33.5
B/C: 27
C: 22.5 to 26.5
D: 22 and lower


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Midterm grades

At the half point of the course we have 43 possible points out of the 100. The number written at the bottom/right corner of your test results sheet is your points out of 43. Take that value and divide by 43 to put into percents.

The average percentage score is 79.08% with a standard deviation of 10%

The following grade scale should be used:

A: 87.5% and higher
B: 79% to 87.49%
C: 69% to 78.99%
D: 50% to 68.99%
F: 49.99% and lower

You will be updated again after the third test.

Section 4 (MW class)--Test 2 and Midterm Grades

Here is the grade/curve distribution for Test 2:

Average: 26.11 out of 40 points (65.27%)
Median: 26
Mode: 26.5
Std deviation: 4.98

This gives the following as an approximate grade scale:

A: 31 and higher
B: 26.5 to 30.5
B/C: 26
C: 21.5 to 25.5
D: 16 to 21
F: 15.5 and lower

***********************************************************************

Midterm grades

At the half point of the course we have 43 possible points out of the 100. The number written at the bottom/right corner of your test results sheet is your points out of 43. Take that value and divide by 43 to put into percents.

The average percentage score is 76.10% with a standard deviation of 11%

The following grade scale should be used:

A: 86% and higher
B: 76% to 85.99%
C: 64% to 75.99%
D: 50% to 63.99%
F: 49.99 and lower

You will be updated again after the third test.

Answer Key to Sample mc questions for Test 2 (Section 4 class only)

This is for the Monday/Wednesday section.

Please check the following key for errors.

1-A, 2-B, 3-A, 4-C,
5-B, 6-C, 7-D, 8-D, 9-B, 10-D,
11-B, 12-C, 13-A, 14-A, 15-B, 16-B,
17-A, 18-A, 19-B, 20-D, 21-A, 22-C,
23-C, 24-D, 25-C, 26-D, 27-C, 28-B,
29-C, 30-D, 31-C, 32-A, 33-C,
34-C, 35-D, 36-A, 37-D, 38-B, 39-A,
40-B, 41-B, 42-B, 43-C, 44-B, 45-D,
46-B, 47-B, 48-C, 49-A, 50-D, 51-C,
52-B, 53-D, 54-D*, 55-A, 56-A, 57-C, 58-B,
59-C

*Problem 54 was originally marked B but it is D. My bad. (Thank you L.K.)

Change of Office Hours on Tuesday

I will be in the office from 10:00 to 11:15 a.m. for office hours on Tuesday, March 4. I have an 11:30 appointment.

Sorry for the inconvenience.

JJ

Answer Key to Sample mc questions for Test 2 (Section 9 class only)

This is for the Tuesday/Thursday class (Section 009).

Here is the key. Let me know if you think there are any errors. Check back for changes or comments.

1-A, 2-B, 3-A**, 4-C,
5-B, 6-C, 7-D, 8-D, 9-B, 10-D,
11-B, 12-C, 13-A, 14-A, 15-B, 16-B,
17-A, 18-A, 19-B, 20-D, 21-A, 22-C,
23-C, 24-D, 25-C, 26-D, 27-C, 28-B*, 29-C,
30-D, 31-C, 32-A, 33-C, 34-A,
35-C, 36-D, 37-B, 38-A, 39-B,
40-B, 41-B, 42-C, 43-B, 44-D, 45-B.

*28 was originally listed as C. But the elasticity is 1.8 so it is definitely elastic. (Thanks B.G.)
**3 was originally listed as C. (Thanks R.E.)

(Note: I put this together rather quickly before my 11:15 class since I promised to get it posted by noon. I will look over this again later to look for any errors. Please let me know if you find any.)

Problem 4: It doesn't say whether it is a price floor or a price ceiling, but that shouldn't matter.

Problem 26: Sorry for the awkward wording on alternative D. Rather than "very substitutes" but should be "very substitutable."

Problem 29: Given you have the elasticity coefficient and the percentage change in price, you should be able to solve for the unknown (percentage change in quantity demanded). This requires an algebraic manipulation of the formula.