C1.2 (i) There are 1,388 observations in the sample. Tabulating the variable cigs shows that 212 women have cigs > 0.

(ii) The average of cigs is about 2.09, but this includes the 1,176 women who did not smoke. Reporting just the average masks the fact that almost 85 percent of the women did not smoke. It makes more sense to say that the “typical” woman does not smoke during pregnancy; indeed, the median number of cigarettes smoked is zero.

(iii) The average of cigs over the women with cigs > 0 is about 13.7. Of course this is much higher than the average over the entire sample because we are excluding 1,176 zeros.

(iv) The average of fatheduc is about 13.2. There are 196 observations with a missing value for fatheduc, and those observations are necessarily excluded in computing the average.

(v) The average and standard deviation of faminc are about 29.027 and 18.739, respectively, but faminc is measured in thousands of dollars. So, in dollars, the average and standard deviation are $29,027 and $18,739.

C1.3 (i) The largest is 100, the smallest is 0.

(ii) 38 out of 1,823, or about 2.1 percent of the sample.

(iii) 17

(iv) The average of math4 is about 71.9 and the average of read4 is about 60.1. So, at least in 2001, the reading test was harder to pass.

(v) The sample correlation between math4 and read4 is about .843, which is a very high degree of (linear) association. Not surprisingly, schools that have high pass rates on one test have a strong tendency to have high pass rates on the other test.

(vi) The average of exppp is about $5,194.87. The standard deviation is $1,091.89, which shows rather wide variation in spending per pupil. [The minimum is $1,206.88 and the maximum is $11,957.64.]

2.4 (i) When cigs = 0, predicted birth weight is 119.77 ounces. When cigs = 20, = 109.49. This is about an 8.6% drop....

... Microeconomics (Fall 2014)
Simon Bowmaker
ProblemSet 6
Submit at lecture (Monday, November 10)
Write your answers on separate sheets of paper. Please include:
your name
your recitation teacher’s name
day and time of the recitation
NB: if your recitation takes place on Monday morning, you must submit your assignment to your teacher at the beginning of the recitation.
1. Assume a monopolist faces the following market demand: Q = 100 - 2P. The...

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DUE DATE: Feb. 12, 2015
1. How can you differentiate the forward price from the value of a forward contract?
(2 points)
2. Explain why an FRA can be viewed as an exchange of a floating rate of interest for a fixed rate of
interest payments and how you can use FRA in mitigating risks.
(4 points)
3. The standard deviation of monthly changes in the spot price of live cattle is 1.2 cents per pound. The
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...FBE 421 Prof. Briggs ProblemSet #1
Please print out this document and clearly handwrite your answers to each of the questions below in the space provided. Show all your work accordingly.
A. Calculate LTM (a) Revenue and (b) Net Income for Costco Wholesale (COST) using their latest financial statements as of 3Q2011.
77946+60737-53821=84,862 MM Revenue 1303+984-871= 1,416 MM Net-income
B. Calculate Costco’s LTM (a) EBIT and (b) EBITDA....

...ProblemSet 1 Gmt 201 Autumn, 2010 1. Consider the markets for DVD movies, TV screens, and tickets at movie theaters. a. For each pair, identify whether they are complements or substitutes:
• • • DVDs and TV screens DVDs and movie tickets TV screens and movie tickets
b. Suppose a technological advance reduces the cost of manufacturing TV screens. Draw a diagram to show what happens in the market for TV screens. c. Draw two more diagrams to show how the change...

...Feenstra and Taylor, “International Trade”, 2nd Edition. We follow the textbook very closely in class and cover about 70% of its contents.
2. Yeaple, Study Guide for Feenstra and Taylor’s International Trade, 2nd Edition. We take many practice problems from the Study Guide.
5 copies of the textbook (2nd edition) and 5 copies of the Study Guide (2nd edition) are on reserve at Parrish (the management-and-econ library).
Distribution of homework and other materials:...

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The US College Enrollment and the “Third Law of Demand”
A theorem proposed by Professors Alchian and Allen in their text, University Economics (1964) has had several rebirths of interest in the literature. The so-called “third law of demand,” or “relative price theorem,” holds that a fixed cost added to a good of varying quality causes the consumer to prefer the category considered of higher quality to the lower.
Recently a number of...

...EC 109
Autumn 2011
Dr. Mani
ProblemSet 2
Due Date: Oct31, Monday – between 9 & 11 AM in room S 2.132
Please keep a copy of your assignment and show all your work clearly.
(1) Mr. J. Bond, a retired movie actor, consumes only grapes and the composite good Y (i.e. price of Y is £1). His income consists of £10000 a year from his investment fund plus the proceeds of whatever he sells of...

...Energy
1. A man climbs on to a wall that is 5 m high and gains 2200 J of potential energy. What is the mass of the man?
Given: Formula:
h = 5 m m = PE/gh
PE = 2200 J
Solution:
m = 2200 J / (9.8 m/s2 x 5 m)
m = 49 kg
2. Calculate the kinetic energy of a 500 kg car travelling at 50 m/s.
Given: Formula:
m = 500 kg KE = mv2/2
v = 50 m/s
Solution:
KE = 500 kg x (50 m/s)2 / 2
KE = 625 000 J
Power
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