Econ221 Chapter 3 Practice Questions
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) If the union of several events covers the entire sample space, it is said these events are:
A) mutually apart.
B
Econ 221, Winter 2013
not to be handed in
solutions posted on March 10, 2013
Homework 7
The following exercises can be found on pages 188-204 of the textbook:
1. Exercise 3.9.4
2. Exercise 3.9.6: this question is vague about the probabilities, so just ass
Econ 221, Winter 2013
due January 22
Homework 2
The following exercises can be found on pages 39-67 of the textbook:
1. Exercise 2.4.4
2. Exercise 2.4.12
3. Exercise 2.4.20
4. Exercise 2.4.22 (hint: use repeated conditioning)
5. Exercise 2.4.36
6. Exercis
Econ 221, Winter 2013
due February 26
Homework 5
The following exercises can be found on pages 138-155 of the textbook:
1. Exercise 3.4.2
2. Exercise 3.4.10: Only find the probability using the cdf and show graphically how you found it.
3. Exercise 3.5.6
Econ 221, Winter 2013
not to be handed in
Homework 4
The following exercises can be found on pages 108-129 of the textbook:
1. Exercise 3.2.2
2. Exercise 3.2.4
3. Exercise 3.2.10 (the question is asking: is the boat or the plane more likely to crash?)
4.
Econ 221, Winter 2013
due March 5
Homework 6
The following exercises can (mostly) be found on pages 160-176 of the textbook:
1. Let X be a random variable that describes your total winnings from the game in which a fair coin
is flipped 3 times, and you wi
Econ 221, Winter 2013
due January 15
Homework 1
The following exercises can be found on pages 20-32 of the textbook:
1. Exercise 2.2.4
2. Exercise 2.2.6
3. Exercise 2.2.8
4. Exercise 2.2.10
5. Exercise 2.2.16
6. Exercise 2.2.22
7. Exercise 2.2.26
8. Exerc
Econ 221, Winter 2013
due January 29
Homework 3
The following exercises can be found on pages 73-109 of the textbook:
1. Exercise 2.6.4
2. Exercise 2.6.14
3. Exercise 2.6.18
4. Exercise 2.6.26
5. Exercise 2.6.34
6. Exercise 2.6.54
7. Exercise 2.7.2
8. Exe
Econ 221, Winter 2013
No due date, not to be handed in
Homework 10
Note that these questions are from odd-numbered questions in the book. Answer the questions without
looking at the back of the book, and only check the answers when you are done.
The follo
Econ 221, Winter 2013
Homework 6 solutions
1. Perhaps the first thing to do with this problem is to find what values X can take. You may recall
from class, or you may calculate again (by enumerating the sample space of ordered sequences
of 3 coin flips) t
Econ 221, Winter 2013
due March 26
Homework 8
The following exercises can be found on pages 245-259 of the textbook:
1. Exercise 4.3.2 (use only the second page page 698 of the table)
2. Exercise 4.3.10 (for part (b), dont bother with the continuity corre
Econ 221, Winter 2013
due April 2
Homework 9
The following exercises can be found on pages 360, 366 and 310 of the textbook:
1. Exercise 6.2.2
2. Exercise 6.2.4
3. Exercise 6.2.8
4. Exercise 6.2.10
5. Exercise 6.3.2
6. Exercise 6.3.6 You would like to inv
UNIVERSITY OF WATERLOO
Department of Economics
Economics 211 Section 001
Instructor: Predrag Rajsic
ASSIGNMENT 1
Due October 7, 2015 (in-class)
STUDENT NAME: _
STUDENT NUMBER: _
Instructions: Answer all questions in the spaces provided. Use the back of th
UNIVERSITY OF WATERLOO
Department of Economics
Economics 211 Section 001
Instructor: Predrag Rajsic
ASSIGNMENT 3
Due November 9, 2015
(Drop-box in the Economics Department)
STUDENT NAME: _
STUDENT NUMBER: _
Instructions: Answer all questions in the spaces
Homework Assignment 2
ECON 221 -001
Professor Liton Chakraborty
Scott Robbins 20529423
Q1
a) P(infrequent shopper and often purchases generic)
=P(a and b) = P(a) * P(b) = (.22/1) * (.33/1) = 0.0726
b)P(frequent shopper and sometimes buys generic)
=P(a and
Scott Robbins 20529423
HOMEWORK ASSIGNMENT 1
ECON 221-001: Statistics for Economists
University of Waterloo
Fall 2014
Q1:
A)
Variable 1: Age, Quantitative. Units: Years
Variable 2: Gender, Categorical
Variable 3: Household Income, Quantitative. Units: Dol
Scott Robbins 20529423
HOMEWORK ASSIGNMENT 1
ECON 221-001: Statistics for Economists
University of Waterloo
Fall 2014
Q1:
A)
Variable 1: Age, Quantitative. Units: Years
Variable 2: Gender, Categorical
Variable 3: Household Income, Quantitative. Units: Dol
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) In a recent survey of college professors, it was found that the average amount of money spent on entertainment
each week was normally distributed wit
October 11, 2012
Econ 221
Midterm Exam 1
Answer the questions in the spaces provided, showing the steps you used to
arrive at your answer. If you run out of room, clearly label where you continue
your answer.
Name:
1. (5 points) Let A and B be two indepen
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following variables is an example of a categorical variable?
A) The geographic region of the country in which you live.
B) The time it t
Econ221 Chapter 2 Practice Questions
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Suppose you are told that the mean of a sample is below the median. What does this information suggest about
the
Econ221 Chapter 4 Practice Questions
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING:
The probability that a person catches a cold during the cold and flu
Econ221 Chapter 5 Practice Questions
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) A function of continuous random variables which allows for graphical interpretations of their probability
struct
Econ 221, Winter 2013
Homework 10 solutions
Because the answers are already there in the book, some of what Ive written below might better
be described as clarifying remarks remarks on how to find the answers. Mostly solutions are
presented; pay attention
Econ 221, Winter 2013
Homework 2 solutions
1. First you have to figure out what E is: for example, E = (A B) (A B)c is one way to write it
(draw a diagram!). Then
P cfw_E|A B =
P cfw_E (A B)
P cfw_A B
=
P cfw_E
P cfw_A B
,
where the second equality comes
Econ 221, Fall 2012
Homework 3 solutions
1. In 3 parts:
(a) 262 104
(b) 262 10 P4 this is a smaller number than in the first part because 10 P4 = 10 9 8 7 < 104 .
(c) 262 104 262 1 = 262 (104 1) I find it easiest to subtract off the small number of
forbid
Random variables: Outline
Example: binomial random variables
Discrete random variables
Expectation
Variance
Joint distributions
Expectation, variance and covariance of several random variables
Continuous random variables
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