EconS 311, Spring 2012
Homework Assignment #9
DUE: April 5 (Thursday)
For an EconS 499 project several semesters ago, a former SES student (Scott Moore) collected
data for all NFL teams for the time period 2000-2009. This resulted in 310 observations. He

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100 Points Total ' EconS 311,0Fall 2008
Show Your Work - - Exam #3
1. Recall the situation in Homework Assrgnment #8 where you analyzed the relationship V
between child mortality

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EconS311, Fall 2007
Exam #3
1. Recall
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100 Points Total EconS 311, Fall 2011 Name: _
Show Your Work Exam #2
In the ﬁrst ﬁve problems on the exam, you will analyze alcohol (beer, wine, hard liquor, etc) sales data,
using several different models. This d

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" ' "‘*sn6w Your work‘ ' Train #2“ —'
1. Health and development economists are interested in identifying factors/variables that
explain differences in child mortality around the world so that they

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100 Points Total EconS 311, Spring 2010 E
Show Your Work Exam #2 /
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l. The poultry industry in the US, including the demand for poultry products, has undergone
signiﬁcant changes since the mid-19705. Similar changes have also occurred in t

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EconS 311, Spring 2011
Exam #2
100 Points Total
Show Your Work
In class and on a homework assignment we evaluated a hedonic price model for the real estate market in
which the price (that a house sold for) was regressed on the various char

EconS 311, Spring 2012
Homework Assignment #Qs
Due: January 26 (Thursday)
Do your work on separate paper for submission in class. Show your work.
1. Expand each of the following and simplify as appropriate. Your final answer should not use summation
notat

EconS 311, Spring 2012
Homework Assignment #4
Duezv February 9 (Thursday)
(Problem 5 from Assignment #3) - You are told that X and Y are random variables, that they are
INDEPENDENT (and hence uncorrelated with each other), and that
X"N(2,1)andY"N(4,8). it

EconS 311, Spring 2012
Homework Assignment #3
‘ ‘ Due: February 2 (Thursday) 1
Except Question 1 which needs to be corinpletedbefore’ (and during) Computer Lab #3 on February 2.
Select one of the topics from the list in the ﬁle Topic Areas for 2/2/12 Comp

EconS 311, Spring 2012
Homework Assignment #5
Due: February 16 (Thursday) in Lecture
In a population it is known that ux = 50 and (5x2 = 36. Suppose that the following random samples
were selected from this population. Use the central limit theorem to ans

EconS 311, Spring 2012
Homework Assignment #6
Due: February 23 (Thursday)
1. The following random sample was obtained from a normal population with unknown
mean ﬁx and unknown variance 0'; : '
8, 9, 6,13,11, 8,12, 5, 4,114
a) Test ,uX =5 against ,uX at 5

EconS 311, Fall 2012
Homework Assignment #7
Due: March 8 (Thursday)
1. Suppose that the energy research consulting company that yOu work for has tasked you
with determining: ls purchasing premium gasoline better than purchasing regular
(unleaded) gasoline

EconS 311, Fall 2012
Homework Assignment #8
"Due: March 29 (Thursday)
Wikipedia is the somewhat controversial on—Iine free encyclopedia that anyone can edit. Some of
the controversy surrounds the fact that Wikipedia's content is written collaboratively by

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6
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New variance
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Housing Expenditure,
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100 Points Total EconS 311, Spring 2008'
ShOw Your Work . Exam #2
1. Consumption of beef has been on a downtrend since it reached its peak in 1976 (88.8 '
lbs per person annually). In this question we are interestedin identifying some of the
factors that

100 Points Total EconS 311, Fall 2010
Show Your Work Exam #2
1. Pricing of automobiles typically follows a hedonic price approach where the price (of an
automobile in this problem) is modeled as a function of the characteristics or attributes of the
spe

100 Points Total EconS 311, Spring 2009 61 v! / \l ’
Show Your Work Exam #3_ 7/ ’8
1. Human capital theory of labor economics suggests that the wage rate that a worker receives
in the labor market is impacted by a "number of factors, including years of e

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100 Points Total EconS 311, Spring 2008 Embed WM '
Show Your Work Exam #3
1. Recall the situation in questions 1 and 2 on Exam #2. Consumption of beef has been on a
downtrend since it reached its peak in

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100Points Total
Answer All Questions
Show Your Work
Exam#1
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1. In Problem 5 on Homework Assignment #2, you were given data on the weight of 10 cereal
boxes of a well-know brand (taken off of the grocery store shelf at

‘ 100 Points Total EconS 311, Fall 2008
Answer All Questions Exam #1
Show Your Work M
l. The joint probability distribution of two discrete random variables X and Y is given by the
following table:
Y
I l 3 9
i 2 1/8 V24 1/24. 1/12 'L/ZLI Wm
W X

‘ 100 Points Total EconS 311, Fall 2009 I
Answer All Questions Exam #1 ' Vi]
Show Your Work
1. The following table gives the joint probabilities for cell phone usage (Y) and stopping
properly at intersections (X).
a)
d)
/
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.00.)?
X
Failed to stop a

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100 Points Total EconS 311, Fall 2010 Name l3 M r WWW
Answer All Questions Exam #1 E
Show Your Work
1. Consider the following joint probability distribution for college GPA (X) and Gender (Y) of
student. For simplicity in calculati

EconS 311, Fall 2011
Exam #1
100 Points Total
Answer All Questions
Show Your Work
1. The following table gives the joint pdf of two random variables, X and Y, where X is the first-year
rate of return (%) expected from investment X and Y is the first—year

‘ 100 Points Total
EconS 311, Spring 2009
Answer All Questions Exam #1
Show Your Work
1.
Moscow Food Coop stocks 4 loaves of Nutri—Bread each day. The probability distribution
for the daily sales ofNutri-Bread (X) is given in the following table. '
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100 Points Total EconS 311, Spring 2008 01y},
Answer All Questions Exam #1 . Baum/i N
Show Your Work
'1.
Based on years of experience, an instructor in introductory econometrics has determined that
in her class the pro

100 Points Total EconS 311, Spring 2010
Answer All Questions Exam #1
Show Your Work
4/
i .a. Find the average house price, E-(X). I L/‘
"(b (wax, 30‘) + (50:3) mo) + (gmfzo) = 5m -. £06)
b. Find the variance of the house prices, Var(X).
7. Q _ . ‘L ‘_

100 Points Total EconS 311, Spring 2011
Answer All Questions Exam #1 x
Show Your Work g‘ﬁ 5 3 ( ﬁxed/MW '
1. Consider the following probability distributions for the probability of your computer- lab
computer crashing in a week period:
a. Find the ex

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100 Points Total EconS 311, Fall 2008 - t
Show Your Work Exam #2 E1416 lW WW .
1. Per capita consumption of red meat (in the United States) has been declining since it
reached its peak in the early 1970s (at 132.2 lbs per person annually).

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100 PointsTotal
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1. Percapitaconsumptionof poultry productshasincreased
dramaticallyover the past
threedecades.Onehypothesisis that this increase due to the changingprice of