Northwestern University
Math 220 Midterm Exam 1
October 20, 2015
Name: 570 Ui! '0 cfw_3 5 Email:
NetID: StudentlD:
Instructions:
0 This exam has 9 problems and 10 pages.
o Make sure that all pages are included.
0 Read each problem carefully.
0 Write legib
Chapter 1- Describing Data: Graphical
statistics- the science of learning from data
parameter- a numerical measure that describes a specific characteristic of a population
statistic- a numerical measure that describes a specific characteristic of a sample
Chapter 4: Part 2
4.7 Jointly Distributed Discrete Random Variables
Joint Probability Distribution
Let X and Y be a pair of discrete random variables. Their joint probability distribution expresses the
probability that simultaneously X takes the specific
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math-220-winter-16-test-1
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Northwestern University
Math 220 Midterm 1
February 1, 2016
Name: 80 L U Tl O N 3 Email:
NetID: StudentID:
Instructions:
0 This exam has 8 problems and 10 pages, where the last
Revenues and Elasticities
Sara Hernndez
January 27, 2017
In class we talked about the relationship between revenues and elasticities. When computing elasticities, Im
not looking at very large changes, Im trying to evaluate marginal changes (small increase
Microeconomics 202 - Practice Exam Questions #1
January 24, 2017
1
(24 points) Elasticities
1. (6 points). You read the following headline in the newspaper: due to the development of a new technology
that lowers production costs, oil prices have decreased
Math Review
Section 1 - Econ 202
January 12, 2017
In Intro to Micro 202 we will use a bit of math to illustrate economic concepts. The following is a review of
some of the most used tools.
Functions
A function describes a relationship
The relationships
1/5/2017
Political Science 341: IPE
Welcome to Political Science 341:
International Political Economy
Winter 2017
Tuesday & Thursday 3:30-4:50pm
Prof. Stephen Nelson
TAs: Horia Dijmarescu,
Shaul Notkin, and Yixue
Shao
Political Science 341: IPE
1/5/2017
T
Microeconomics 202 - Practice Exam Questions #1
January 24, 2017
1
(24 points) Elasticities
1. (6 points) You read the following headline in the newspaper: due to the development of a new
technology that lowers production costs, oil prices have decreased
Section 2 - Econ 202
Winter 2017
January 13, 2017
1
Demand Shocks
In class you saw an exercise where we modeled the demand for a cup of coee as a function of the
price of coee itself, the price of tea, the price of muns and your income,
QD = D(p, pT , pM
Blackboard Problem Set #4b
D
q-b
1.
Complete Problem #3.82 on page 118. (Round your final answer to four decimal
places. Remember to express your answer as a proportion.)
2.
Complete Problem #3.83 on page 119. (Round your final answer to four decimal
plac
Blackboard Problem Set #lb
The mean of X= 10 and the variance of X= 2. The variable X is linearly transformed
such that Xnew = a + bx. The mean of Xnew = 60 and the variance o^Xnew = 8. Suppose b
is a positive number. What does a equal?
2.
Consider a data
Blackboard Problem Set #1 la
1.
Fis regressed against X. The sum of the squares of the deviations of the predicted Y
values from their mean is 100. The sum of the squares of the deviations of the actua Yvalues from their mean is 400. There is a positive r
Chapter 5- Part 3
5.6- Jointly Distributed Continuous Random Variables
Many of the concepts and results from discrete random variables also apply for continuous random
variables.
Joint Cumulative Distribution Function
Let X1, X2, , XK be continuous random