ECO220
Term Test 2
December 14, 2012
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ECO220Y: Homework 5 - SOLUTIONS
Problems:
(1) Yes, they can be NON-linearly related. For example, a symmetric parabola has a relationship, but if fit a
line it will be horizontal.
(2) (a) The covariance is 41.3 mark-hours.
(b) The coefficient of correlati
ECO220Y: Homework 4- SOLUTIONS
Exercise: Chapter 6: 45, the covariance is 20.05.
0
Density
.05 .1
.15
Problems:
(1) These data are unusual in that there are a large number of people reporting an age of 66: at least 10% of
the sample. Between 5% and 10% of
Homework 6: ECO220Y SOLUTIONS
Exercises full solutions for Chapter 8 exercises are available on the portal.
Problems:
(1)
(a) Conditional. P(work | being a woman) = 0.65
(b) Conditional. P(women | being a worker) = 0.45
(c) Conditional. P(English not firs
ECO220Y: Homework 2 - SOLUTIONS
Problems:
(1) Many possible solutions. Cross-sectional: percent of regular faculty that are women in a sample of 34
economics departments in universities around the world in 2004. Time series: percent of regular faculty tha
ECO220Y: Homework 1 - SOLUTIONS
Problems:
(1)
(a) The average sampling error is 0.1584. (If you are not sure how you get this result, please talk to a TA
during tutorial or his office hour.) [Solution corrected on September 18.]
(b) The average sampling e
ECO220Y: Homework 1
Exercises: Chapter 2: 7
Problems:
(1) Remember the in-class exercise in Lecture 1 about iPhone market share.
What we did is as follows:
(A) Everyone in the classroom wrote his/her name and whether he/she is an iPhone user or not
(yes/n
ECO220Y Term Test 2 FORM03 (December 14, 2010)
SOLUTIONS:
(1) Which of the statements below is true if the slope of the OLS line through the scatter plot of X
and Y is negative? (E)
(2) What are the mean and standard deviation of X? (A)
(3) Population mea
ECO220Y Term Test 2 (December 14, 2010)
Page 1 of 14
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Instructors: M.Tanaka
Duration: 80 minutes. You may not leave the test room until at least 60 minutes have passed.
Format: 21 multiple-choice questions. Record answers
ECO220
Term Test 3
March 1, 2013
Solution
Part I: Multiple Choice Questions[Questions (1)-(11), 34 points]
Questions with two possible answers, (A)-(B), are worth 2 point
Questions with three possible answers, (A)-(C), are worth 3 points
Questions with fi
ECO220
Term Test 3
March 1, 2013
Last
Name:
First
Name:
Student
#:
While you wait for the start of this test, you may fill in the FRONT and BACK of the bubble
form and read this cover. However, please keep this test paper face up and flat on your desk.
In
ECO220
Term Test 2
December 14, 2012
SOLUTION
(1) P(X=2)=0.24 (B)
(2) P(X>0)=1 (A)
(3) The diagram below cannot be a density function for a continuous random variable. (A)
(4) The sample mean of a Binomial random variable is identical to the sample propor