prelim-1-spring-2019
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Cornell University *
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Course
3120
Subject
Economics
Date
Apr 3, 2024
Type
Pages
18
Uploaded by AgentThunderSnake50 on coursehero.com
Department of Economics
Econ 3120
Cornell University
Applied Econometrics
Spring 2019
Prelim 1 — Spring 2019
GENERAL INSTRUCTIONS:
•
Write your name here:
•
You can use any notes you have written (or printed) on a single sheet of paper.
•
You may use a calculator as long as you don’t use it to store additional notes
or connect to the Internet.
•
You may not use a cell phone, the internet, make phone calls, or send text
messages during the exam.
•
Show your work.
•
Please write as neatly as you can.
•
If you need to make assumptions, please clearly state them in your answer.
1
Question 0. Brief Survey on Studying
(2 points)
Your answers to these questions have absolutely no impact on your exam score,
and I will remove all your names before I analyze this data.
(1) How much of the material we’ve covered since the review module (i.e.,
experiments and bivariate regression) had you seen before?
a. none
b. some
c. almost all or all
(2) We’ve had 9 classroom lectures so far this term. How many did you attend
in person?
(3) Not including attending lectures, how much time have you spent on this
class each week doing things like reading or working on problem sets?
a. less than one hour
b. 1-2 hours
c. 3-4 hours
d. 5-6 hours
e. 7+ hours
(4) How much time did you spend studying for this prelim?
a. less than one hour
b. 1-4 hours
c. 4-8 hours
d. 9+ hours
(5) Did you mostly study for this prelim by yourself or with other students in
the class?
a. mostly by yourself
b. mostly with other students in the class
c. about half by yourself and half with other students in the class
(6) When did you do most of your studying for this prelim?
a. the day before and day of the exam
b. spread over multiple sessions over multiple days starting before the
night before the exam
2
O
at
o
o
o
o
(7) What did you do to study for this prelim? (Choose all that apply)
a. Review the lecture slides and/or your notes
b. Read the book
c. Identify areas or topics you are struggling with and get help (e.g., in
o
ffi
ce hours or on the course discussion board)
d. Study the problem sets and solutions
e. Re-work problems from the problem sets
f. Work new sample problems
g. Explain or teach the material to someone else
3
8
O
o
o
Question 1. Probabilities in School and Business
(23 points)
Suppose a college student is taking three courses: a two-credit course, a three-
credit course, and a four-credit course. The expected grade in the two-credit
course is 3.5, while the expected grade in the three- and four-credit courses is
3.0.
(a) What is the expected overall grade point average for the semester?
Re-
member that each course grade is weighted by its share of the total number
of units.
4
2
3
4
9
E
x
305127
3134
413
3.11
EPA
random
variable
weighted
avg
of
grades
in
the
3
classes
Let X denote the annual salary of workers in Columbus, Ohio, meaured in
thousands of dollars. Suppose that the average salary is 52.3, with a standard
deviation of 14.6.
(b) Find the mean and standard deviation when salary is measured in dollars.
(c) If you took a random representative sample of 1000 workers, would you
expect the distribution of salary in your sample to be normal?
Why or
why not?
Would you expect the distribution of the sample mean to be
normal? Why or why not?
5
let
4
10004
represet
salary
measured
in
ELY
ELLOOOX
1000
EX
452,300
SDLY
Farfooxs
1,000,00
4.62
5141600
n
large
sample
salary
distribution
similar
to
distribution
in
the
population
Pop
dist
likely
non normal
ble
bounded
at
O
on
bottom
has
a
long
tail
at
the top
Sample
mean
should
be
approx
norm
distributed
Dlc
CLT
Much is made of the fact that certain mutual funds outperform the market
year after year (that is, the return from holding shares in the mutual fund is
higher than the return from holding a portfolio such as the S&P 500).
For
concreteness, consider a 10-year period and let the population be the 4,170
mutual funds reported in
The Wall Street Journal
on January 1, 1995.
By
saying that performance relative to the market is random, we mean that each
fund has a 50-50 chance of outperforming the market in any year and that
performance is independent from year to year.
(d) If performance relative to the market is truly random, what is the proba-
bility that any particular fund outperforms the market in all 10 years?
(e) Of the 4,170 mutual funds, what is the expected number of funds that will
outperform the market in all 10 years?
6
Pr
outperforming
any
given
year
Preformance
independent
year
to
year
Outperforming
all
10
years
510
000977
n
4170
p
org
rta
Binomial
random
variable
EE
np
4.07
Your preview ends here
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Related Questions
Learning Activity 9.2
Question 2
Consider an economy that produces and consumes shoes and houses. In the table below are data for two different users.
2000
2001
Price of a house
$120,000
$145,000
Number of houses produced
1000
1050
Price of a pair of shoe
$150
$170
Number of pairs of shoes produced
650,000
525,000
Year 2000 Year 2001 Price of a house $120,000 Price of a pair of shoes $150 $170 Number of houses produced 1,000 Number of pairs of shoes 650,000 525,000
(a) What is the Consumer Price Index (CPI)?
(b) Calculate the CPI for both years.
(c) Calculate the rate of inflation for 2001 using the CPI.
(d) Calculate the GDP deflator for both years.
(e) Calculate the rate of inflation for 2001 using the GDP deflator.
arrow_forward
1. Draw a circular-flow diagram. Identify the parts of the model that correspond to the flow of goods and services and the flow of dollars for each of the following activities.
a. Selena pays a storekeeper $1 for a liter of milk.
b. Stuart earns $4.50 per hour working at a fast-food restaurant.
c. Shanna spends $30 to get a haircut.
d. Salma earns $10,000 from her 10% ownership of Acme Industrial.
arrow_forward
41. Ahmed is a new student in the economics course. On the first day of the course the teacher told him about Micro and Macroeconomics in detail. Which of the following illustrates Micro and Macroeconomics?
a.
All of these.
b.
Study of the individual consumer is Microeconomics and the study of all consumers are Macroeconomics
c.
Study of one product is microeconomics and study of all products are macroeconomics
d.
Study of one person’s income is microeconomics and study of national income is macroeconomics
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What is the importance of studying macroeconomics in our daily lives? (80 words minimum)
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1. Draw a circular flow diagram. Identify the parts of the model that correspond to the flow of goods and services and the follow of money for each of the following activities. Alain pays a storekeeper P100 for a liter of milk. John earns P90 per hour working at a fast-food restaurant Hanna spends P120 to get a haircut Anton earns P100,000 from his retailing business.
arrow_forward
Draw a circular-flow diagram. Identify the parts of the model that correspond to the flow of goods and services and the flow of dollars for each of the following activities.
Sam pays a storekeeper $1 for a quart of milk.
Sally earns $4.50 per hour working at a fast food restaurant.
Serena spends $7 to see a movie.
Stuart earns $10,000 from his 10 percent ownership of Acme Industrial.
arrow_forward
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23. A Malthusian and a modern economist walk into a bar and converse as follows: MALTHUSIAN: I bet you $1,000 that I can make the average patron in this bar wealthier with a simple trick.MODERN ECONOMIST: I agree to your bet, and bet you $2,000 that I can do a better job.Thus, the Malthusian proceeds to murder half of the patrons, cleanly disposing of their bodies. The modern economist, on the other hand, replaces the bartender with a robot. How can we explain this ridiculous situation?(A) The Malthusian believes that killing people raises per-capita wealth, while the economist believes that technological improvements raise per-capita wealth.(B) The Malthusian believes that the agricultural commodities used in beer are scarce, and should be preserved; the modern economist believes that technological im- provements raise per-capita wealth.(C) There is no underlying logic to their actions.(D) The Malthusian and modern economists are both soyjacks…
arrow_forward
Chinese investors decide to buy the Summerside golf course and build
a resort hotel. The journal announces that the local business deal injects
$10,000,000 into the local economy. In the article, a three oaks economic
student tells reporters that it will benefit the local economy by creating
growth of $80,000,000 over the next 4 years of construction. Explain the
students reasoning using proper economic terms.
arrow_forward
Economists use the scientific method to study the economy. David Matthews is an economist studying the effect of cold weather on the purchasing of streaming movies. Place the following steps in order.
David notices that people tend to stream more movies at home when the weather is cold outside.
David comes up with the theory that home streaming platforms will have more business in the winter months than at other parts of the year.
David arranges to follow the streaming habits of a thousand different families. He will also record the weather on each day.
At the end of the year, David will see if his theory was correct by comparing the number of movies downloaded with the weather for certain days. He will then decide if his theory was correct.
arrow_forward
Lori is a student who teaches golf on the weekend and in a year earns $20,000 after paying her taxes. At the beginning of 2010, Lori owned $1,000 worth of books, CDs, and golf clubs and she had $5,000 in a savings account at the bank. During 2010, the interest on her savings account was $300 and she spent a total of $15,300 on consumption goods and services. There was no change in the market values of her books, CDs, and golf clubs.
(i) How much did Lori save in 2010?
(ii) What was her wealth at the end of 2010?
arrow_forward
Question 2
Consider an economy that produces and consumes shoes and houses. In the table below are data for two different users.
2000
2001
Price of a house
$120,000
$145,000
Number of houses produced
1000
1050
Price of a pair of shoe
$150
$170
Number of pairs of shoes produced
650,000
525,000
Year 2000 Year 2001 Price of a house $120,000 Price of a pair of shoes $150 $170 Number of houses produced 1,000 Number of pairs of shoes 650,000 525,000
(d) Calculate the GDP deflator for both years.
(e) Calculate the rate of inflation for 2001 using the GDP deflator.
arrow_forward
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( ALL OF IT IS ONE QUESTION!!!)
For the article which graph (1-12) best describes what happened.
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For some couples, the solution for too much pandemic togetherness is saying good night on Valentine’s Day in a bigger bed where they don’t need to touch.
After nearly two years of working from home and sharing close quarters with spouses, kids and pets, people are tossing out their full- and queen-size beds in favor of more spacious kings.
After nearly two years of working from home and sharing close quarters with spouses, kids and pets, people are tossing out their full- and queen-size beds in favor of more spacious kings.
Robert Pagano and his girlfriend, Tracy Jones, weighed the pros and cons of switching to a king from a queen last year. The couple, who live in Las Vegas, had been getting on each other’s nerves when they were stuck working from home.
“We hoped a bigger bed would help us avoid arguments,” Mr. Pagano said. “But we were worried the extra…
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possible production costs
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one's top two choices when making a decision
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Related Questions
- Learning Activity 9.2 Question 2 Consider an economy that produces and consumes shoes and houses. In the table below are data for two different users. 2000 2001 Price of a house $120,000 $145,000 Number of houses produced 1000 1050 Price of a pair of shoe $150 $170 Number of pairs of shoes produced 650,000 525,000 Year 2000 Year 2001 Price of a house $120,000 Price of a pair of shoes $150 $170 Number of houses produced 1,000 Number of pairs of shoes 650,000 525,000 (a) What is the Consumer Price Index (CPI)? (b) Calculate the CPI for both years. (c) Calculate the rate of inflation for 2001 using the CPI. (d) Calculate the GDP deflator for both years. (e) Calculate the rate of inflation for 2001 using the GDP deflator.arrow_forward1. Draw a circular-flow diagram. Identify the parts of the model that correspond to the flow of goods and services and the flow of dollars for each of the following activities. a. Selena pays a storekeeper $1 for a liter of milk. b. Stuart earns $4.50 per hour working at a fast-food restaurant. c. Shanna spends $30 to get a haircut. d. Salma earns $10,000 from her 10% ownership of Acme Industrial.arrow_forward41. Ahmed is a new student in the economics course. On the first day of the course the teacher told him about Micro and Macroeconomics in detail. Which of the following illustrates Micro and Macroeconomics? a. All of these. b. Study of the individual consumer is Microeconomics and the study of all consumers are Macroeconomics c. Study of one product is microeconomics and study of all products are macroeconomics d. Study of one person’s income is microeconomics and study of national income is macroeconomicsarrow_forward
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- Brief Principles of Macroeconomics (MindTap Cours...EconomicsISBN:9781337091985Author:N. Gregory MankiwPublisher:Cengage LearningEssentials of Economics (MindTap Course List)EconomicsISBN:9781337091992Author:N. Gregory MankiwPublisher:Cengage LearningPrinciples of MicroeconomicsEconomicsISBN:9781305156050Author:N. Gregory MankiwPublisher:Cengage Learning
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