Economics 120A
Spring 2011
Dr. Maria Cndido
Student Name: _
Student ID: _
Name of Student to your right: _
Name of Student to your left: _
Economics 120A 1st Midterm Examination Answer Key
Spring Quarter
April 19th, 2011
Version A
Instructions:
a.
You hav
Chapter 7 Point Estimation
Do all the problems in the textbook.
Problems from the workbook:
1. In Chapter 1 we saw how nonrandom samples can be biased. In Chapter 6, we
studied biased estimates more formally. Let us see how these two ideas are
related, wi
Economics 120A July 30, 2003
Name: _key_ Student ID#: _ ANSWER to Final Exam: Econometrics
1.(10 points) The stamping machine on a production line periodically is taken offline for maintenance. Assume that the amount of time the machine is offlin
Multiple Choice A Yellow (4 pts each, 24 pts total)
Enter your answer on the cover page. You do not have to justify your answer.
1) A poll of 120 San Diegans found that 30 had visited the Natural History Museum, and that 80 had been to Home Depot.
If it a
Multiple Choice B Blue (4 pts each, 24 pts total)
Enter your answer on the cover page. You do not have to justify your answer.
1) Which of the following statement is true?
A) The value of the mean absolute deviation may be either positive or negative, whi
Economics 120A Professor Yongil Jeon Summer 2007
Name: _answer_ Student ID#: _ Answer to Homework #2 Summer 2007
(Final Exam, Summer 2006)
Answer all questions on separate paper. This problem set should be handed in to TA Deniz Kebabci at the begi
Economics 120A Professor Yongil Jeon Winter 2008
Name: _ Student ID#: _
Answer to Homework #2 Winter 2008 (Part of Midterm and Final Exams, Summer 2007) Answer all questions on separate paper. This problem set should be handed in to Professor Jeon
Economics 120A Spring 2010 Dr. Maria Cndido
Student Name: _ Student ID: _
Name of Student to your right: _ Name of Student to your left: _
Economics 120A 1st Midterm Examination Answer Key Spring Quarter April 22nd, 2010 Version A
Instructions:
a.
You hav
Economics 120A
Spring 2013
Dr. Maria Cndido
Student Name: _
Student ID: _
Name of Student to your right: _
Name of Student to your left: _
Economics 120A 1st Midterm Examination Solutions
Spring Quarter
April 26th, 2013
Version A
Instructions:
a. You have
Economics 120A Fall 2006 Prof. Maria Cndido
Economics 120A Final Examination Fall Quarter December 5th, 2006 Instructions: a. You have 3 hours to finish your final exam. Put your name and student ID number on the cover of the bluebook. b. The Buckley Waiv
Economics 120A Professor Yongil Jeon Summer 20082
Name: _ Student ID#: _keys_
Answer key to Homework #1 Summer 2008Session 2, Econ 120A (Exam #1 and a part of Exam #2, Winter 2008, Econ 120A) Answer all questions on separate paper. This problem
ECON120A
Midterm 1 Review
Yanjun (Penny) Liao
1
Two Main Themes
Statistics
o Concepts
o Histogram
o Box Plots
Probability
o Independent vs. Dependent Events
o Conditional Probability
o Bayes Theorem
We would look at some problems from the pra
Economics 120A Professor Yongil Jeon Summer 2007
Name: _answer_ Student ID#: _ Answer to Homework #1 Summer 2007
(Midterm Exam, Summer 2006)
Answer all questions on separate paper. This problem set should be handed in to TA Deniz Kebabci at the be
Economics 120A Professor Yongil Jeon Summer 2005
Name: _ Student ID#: _
Answer to Homework #1 (Midterm Exam, Summer 2004)
1. (10 points) Columbia House provides CDs and tapes to its mailorder club members. A Columbia House Music Survey asked new c
Economics 120A Fall 2008 Dr. Maria Cndido
Student Name:_ Student ID:_ Economics 120A Final Examination Answer Key Fall Quarter December 12th, 2008 Version A Instructions:
a.
You have three hours to finish your exam. Write your name and ID number on the up
Chapter 4 Probability Distributions
Do all the problems in the textbook.
Problems from workbook:
1. The Swedish population of mens heights is approximately normally distributed with
a mean of 69 inches and standard deviation of 3 inches. Find the proporti
Chapter 6 Sampling
Note: In red, I signaled questions that require chapter 5 material. Skip those questions.
Do the following problems in the textbook: 61 to 614, 628 to 631, 632, 635, 637, 638, 640 to 643
Problems from the workbook:
1. A union o
Chapter 3 Probability Extra Practice Problems
1. I kept extensive records of my favorite baseball pitcher, and that is what I
found for those batters who took three pitches (or more). Three strikes in a
row were pitched 15% of the time. And for every poss
Chapter 2
Descriptive Statistics Extra Practice Problems
Descriptive Statistics: Utilizes numerical and graphical methods to explore data: to look at patterns
in a dataset, to summarize the information revealed in a dataset and to present information in
Detailed Solutions for Chapter 3: Problems 311, 313, and 317.
Problem 311
a) To calculate the probability of at least one boy, it is very useful to use the complement of the
event in the calculation; otherwise, it would take an extremely long time to
TOPIC 2  Descriptive Statistics
A. Frequency Distributions, Table, Histograms
a) Raw Data
X = student weight (in lb.)
Cross Section
106
180
.
155
i = 1 22
170
110
Xi
150
n=22
b) Tabulating Frequency Distributions (grouped data)
i.
C classes (nonoverlapp

TA Office Hours will be posted on TED

Professors Office Hours are MWF 10:10:30 AM in Tapioca Express
CLASS MATERIAL:
TOPIC 1 Preliminaries (basic introductory concepts)
A. Intro to Statistics
Definition of statistics: A type of mathematical analysis i
CLASS MATERIAL:
(continuation of the previous lectures notes)
Mean absolute deviation (MAD)
i.
Definition of MAD: The MAD of an element of a data set is the absolute difference
between that element and a given point.
=
Coefficient of Variation (CV)
ii.
De
TOPIC 3 Probability (continued)
B. Probability of Events and Addition Law
a) Events
i.
Definition of event: A subset of sample space s
If A is an event, then A
s
Each simple outcome e1
s is an event
b) Combination of Events
i.
Intersection and complement
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Economics 120A
Spring 2013
Dr. Maria Cndido
Student Name:_
Student ID:_
Assigned Seat: _
Economics 120A Final Examination Solutions
Spring Quarter
June 14th, 2013
Version A
Instructions:
a.
You have three hours to finish your exam. Write your name and ID
Ec 120A
PRELIMS
Econ 120A ECONOMETRICS A
Foster, UCSD
p. 1 of 8
LECTURE NOTES
October 23, 2016
TOPIC 1 PRELIMINARIES
A. Introduction to Statistics
1. What Does "Statistics" Mean?
a) Data base  collection of observations or measurements of variables tabul
Ec 120A
RANDOM VARIABLES
p. 1 of 20
Econ 120A ECONOMETRICS A
Foster, UCSD
LECTURE NOTES
August 4, 2014
TOPIC 4 RANDOM VARIABLES
A. Introduction to Random Variables
1. Definitions:
a) Random variable (r.v.)  a function (X) which assigns a real number (x k
Econ 120A ECONOMETRICS A
Foster, UCSD
LECTURE NOTES
October 16, 2016
TOPIC 4 RANDOM VARIABLES
A. Introduction to Random Variables
1. Definitions:
a) Random variable (r.v.)  a function (X) which assigns a real number (xk) to each outcome
(ej) in the sampl
Econ 120A ECONOMETRICS A
Foster, UCSD
LECTURE NOTES
October 16, 2016
TOPIC 5 USEFUL PROBABILITY DISTRIBUTIONS1
A. The Bernoulli and Binomial Distributions
1. Bernoulli Distribution: (very basic, not too important)
a) Bernoulli Trial a statistical experime
Econ 120A ECONOMETRICS A
Foster, UCSD
LECTURE NOTES
October 16, 2016
TOPIC 3 PROBABILITY
A. Introduction to the Statistical Experiment Paradigm
1. Statistical Experiments:
a) Statistical experiment  a random (stochastic) process that generates one outcom