12. What is the most common magnetic nanoparticle oxide compound family? What are the variants, and why is it used more commonly than other compounds? 13. Is diffusion of solutes in nano-channels the same as in bulk solvent? Give two mechanisms that can be expected to modify the diffusion coefficient. 14. Can the chemical properties of materials change at the nanoscale? Give an example, and a plausible cause for such a change.

 

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12.   The Student Government Association at Middle Carolina University wanted to demon- strate the relationship between the number of beers a student drinks and their blood alcohol content (BAC). A random sample of 18 students participated in a study in which each participating student was randomly assigned a number of 12-ounce cans of beer to drink. Thirty minutes after consuming their assigned number of beers a member of the local sheriff’s office measured their blood alcohol content. The sample information is reported below.

Student

Beers

BAC

 

Student

Beers

BAC

1

6

0.10

10

3

0.07

2

7

0.09

11

3

0.05

3

7

0.09

12

7

0.08

4

4

0.10

13

1

0.04

5

5

0.10

14

4

0.07

6

3

0.07

15

2

0.06

7

3

0.10

16

7

0.12

8

6

0.12

17

2

0.05

9

6

0.09

18

1

0.02

 

Use a statistical software package to answer the following questions.

a.   Develop a scatter diagram for the number of beers consumed and BAC. Comment on the relationship. Does it appear to be strong or weak? Does it appear to be positive or inverse?

b.  Determine the correlation coefficient.

c.   At the .01 significance level, is it reasonable to conclude that there is a positive rela- tionship in the population between the number of beers  consumed  and  the BAC? What is the p-value?

 

 

 

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12 Jack is an out-of-work sculptor. He has been looking for a job for the last two years. Unable to find any, he has up his job search. Which of the following is true in this case? OHe is a discouraged worker and will not be included in the calculation of the unemployment rate. OThis is an example of structural unemployment O This is an example of frictional unemployment ?He is a part of the unemployed labor force.

 

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12) Suppose a consumer’s income increases from $60,000 to $72,000. As a result, the consumer increases her purchases of compact disks (CDs) from 50 CDs to 60 CDs. What is the consumer’s income elasticity of demand for CDs (arc or midpoint formula)? Please explain the steps. A) 2.0 B) 1.5 C) 0.5 D) 1.0

 

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13. On January 3, 2011, Haskins Corporation acquired 40 percent of the outstanding common stock of
Clem Company for $990,000. This acquisition gave Haskins the ability to exercise significant influence
over the investee. The book value of the acquired shares was $790,000. Any excess cost over
the underlying book value was assigned to a patent that was undervalued on Clem’s balance sheet.
This patent has a remaining useful life of 10 years. For the year ended December 31, 2011, Clem
reported net income of $260,000 and paid cash dividends of $80,000. At December 31, 2011, what
should Haskins report as its investment in Clem under the equity method?

 

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