Economic Statistics
1.
Spring Quiz
February 7th, 2005
A sports consulting firm wants to decide which courier service to use. A random sample of
10 delivery times from Tortoise courier service had a mean of 240 minutes, with a standard
deviation of 36 minu
Autumn 2000
1.
October 13 th, 2000
Quiz
For the data set cfw_12,34,86,31,11,19,103,111 answer the following questions:
a)
b)
What number would be calculated (SPSS-style) as a 60 th percentile for the
data set?
c)
Find the z-score for the number 111.
d)
2.
1.
In November 2001 a popular chain of coffee shops launched its prepaid debit
card. The card, which can be for any amount from $5 to $500, can be used at any
of the locations of the chain. The card was so popular when it was first released
that many stor
5.
An advertising firm has conducted some market research to determine whether
the type of campaign they project for a new product will be effective. A random
sample of potential clients was selected before the campaign, and the numbers in
the sample who
1. At Eurelia University the only marks given are A, B, C, D, and F. The letter
grades are converted for the purposes of calculating grade-point averages,
with A being given the value 4, B the value 3, C the value 2, D the value 1, and
F the value 0. In a
ECON227D1
1.
Y
a)
b)
-1
-2
0.03
1 0.20
4 0.07
Total 0.30
X
1
0.04
0.30
0.16
0.50
5
0.03
0.10
0.07
0.20
Total
0.10
0.60
0.30
1.00
Find ( X , Y ) and the covariance of X and Y.
The independence criterion holds in two of the cells. Find
those cells.
c)
d)
2.
ECON227D1
1.
A group of 60 stocks includes 36 that have increased in value since
November 1st, and 24 that have decreased since November 1 st.
a)
b)
If the stocks are examined in a random manner one-by-one,
what is the probability that the first three wil
CUMULATIVE PROBABI-LITIES
FOR THE STANDARD NORMAL
DISTRIBUTION
Entries in this table give
the area under the curve
to the left 6f the z vame.
For exampie, for z = 1.25,
the cumutative probabitity
2: 71 R0118
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
A.J.Jones has collected data on white-collar employees under
30 years of age in the 3 rival cities of Eurelia, Begonia, and
Gorgon. Each of the employees sampled agreed to complete a
standardized test.
1.
In a very short preliminary study Jones took small
Monkey Cage
Economic development promotes democracy, but
theres a catch
By Daniel Treisman December 29, 2014
JoshuaTucker:OneofourregularfeatureshereatTheMonkeyCageissummariesfrompoliticalscientistsof
recentlypublishedresearch.Wehavearrangedforarticlestha
A.J.Jones has collected data on white-collar employees under
30 years of age in the 3 rival cities of Eurelia, Begonia, and
Gorgon. Each of the employees sampled agreed to complete a
standardized test.
1.
In a very short preliminary study Jones took small
Tradewins
All latest updates
Twelve countries reach an agreement on
trans-Pacific trade
TheTPPnowfacesahardroadtopassageinnationallegislatures
Oct 5th 2015 | Online extra
AFTER more than five years of negotiations,
representatives from 12 countries in Asi
MGCR 293 Managerial Economics (Section 1) FALL 2016
ASSIGNMENT # 2 (Total 100 points)
Due date: November 28th (Monday) by 4pm
Instructions
1. Make sure to write the name and student ID# of each student in the group on the cover
page.
2. Only 1 assignment
CUMULATIVE PROBABI-LITIES
FOR THE STANDARD NORMAL
DISTRIBUTION
Entries in this table give
the area under the curve
to the left 6f the z vame.
For exampie, for z = 1.25,
the cumutative probabitity
2: 71 R0118
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
Introductory Statistics
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201
N.B.
This assignment is to be handed in on September 29 th or 30th .
1.
The following data are randomly-selected service times at an
automated laundromat. The data are presented in stem-and-leaf
notation. The times are in minutes.
3
4
0
2
0
3
4
5
5
6
7
3
ECON 227
December 2016
Midterm Examination
ECONOMIC STATISTICS
ECON 227 sections 001/002
December 14th 2016
14:00 to 17:00
Examiner: K.MacKenzie Assoc Examiner: J.Kurien
INSTRUCTIONS:
o This is a CLOSED BOOK examination.
. One 8.5 by 14 (legal-s
1.
Consider this bivariate probability distribution (joint probability
table):
X
Y
2.
10
15
-3
0.21
0.08
0
0.23
0.16
8
0.13
0.19
a)
Calculate Cov(X,Y), and (X,Y).
b)
Let E be the event that Y=0, and F be the event that X=15. Are
E and F statistically inde
ECON227D1
1.
2.
A group of 60 stocks includes 36 that have increased in value since
November 1st, and 24 that have decreased since November 1st.
a)
A.J.Jones has taken a random sample of 6 stocks from the
group, and would like to calculate (before looking
Lecture 14/02/03
February 3, 2014
2:40 PM
Announcements
- No more office hours on Monday
- Homework: sample standard deviation ( ) for samples (divide by n-1) is not the same as population standard
deviation ( ) for whole population (divide by N).
x-bar i
Lecture 14/02/05
February 5, 2014
2:33 PM
Announcements
Chi-square might be on quiz - more information to follow
Chi-square
Pearson:
(from Poisson)
Z-score, Poisson, all around the same time, Pearson did this:
We often use O (observed datum) for x and E (
ECON227D1
1.
A group of 60 stocks includes 36 that have increased in value since
November 1st, and 24 that have decreased since November 1 st.
a)
b)
If the stocks are examined in a random manner one-by-one,
what is the probability that the first three wil
Counting Principles
Basic Counting Principle
If there are n1 ways of doing a first thing, and, for each of these ways, there are nﬁ
ways of doing a second thing, then there are n1n2 ways of doing the two things.
This principle extends to sequences of more
1.
The following data are randomly-selected service times at an
automated laundromat. The data are presented in stem-and-leaf
notation. The times are in minutes.
3
4
5
0
2
3
0
3
5
6
2
5
6
5
2
7
6
7
8
9
7
7
8
9
8
8
8
9
8
9
10
6
8
7
7
4
5
7
11
12
13
x 67.41
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