Economics 350K: Fall 2007 Problem Set 1 DUE: WEDNESDAY, SEPTEMBER 19 NAME: _ I. The Production of Health
Helen Schneider
1. Use production theory to graphically illustrate the case in which a medical innovation improves health without any change in
DESCRIPTIVE STATISTICS
Dr. V.R. Bencivenga
Economics 329
Economic Statistics
DESCRIPTIVE STATISTICSPART 3
Outline
Objectives:
I. Covariance
Methods for describing how the distributions
of two variables are related
II. Correlation
III. Regression
What it m
Dr. Valerie R. Bencivenga
Economics 329
Fall 2011
Sept. 28, 2011
MIDTERM EXAM #1
Instructions: Answer the questions below in a blue book. Show your work to receive credit! There are eight
problems worth a total of 320 points. The exam will last two hours.
Dr. Valerie R. Bencivenga
Economics 329
PRACTICE MIDTERM EXAM #1
Instructions: Answer the questions below in a blue book. The exam consists of ten questions worth a
total of 200 points. The exam will last two hours. This is an open book, open notes exam.
Practice Questions 2
ECO 329
1. The finishing process on new furniture leaves slight blemishes. The table shown below displays a manager's probability assessment of the number of blemishes in the finish of new furniture. Number of Blemishes Probabi
Practice Questions 1
ECO 329
1. When data are collected in a statistical study for only a portion or subset of all elements of interest we are using A) B) C) D) a sample. A parameter. A statistic. A population.
2. A summary measure that is compute
Practice Questions 6
QUESTIONS 1 THROUGH 3 ARE BASED ON THE FOLLOWING INFORMATION:
Let X 1 , X 2 , X 3 , and X 4 be a random sample of observations from a population with mean
and variance 2 . Consider the following two point estimators of :
ˆ
1 = 0.10 X
Practice Questions 3 1. Which of the following is an example of a discrete random variable? A) B) C) D) The distance you can drive in a car with a full tank of gas. The number of cows on a cattle ranch. The weight of a package at the post office. The
Practice Test 3
Part 1. Discrete Random Variables
1. Three automobiles are selected at random, and each is categorized as having a diesel ( S) or nondiesel (F)
engine (so outcomes are SSS, SSF, etc.). If X = the number of cars among the three with diesel
Practice Questions 7 1. You are interested in examining the salaries earned by graduate business school students at the end of the first year after graduation. In particular, you are interested in seeing whether there is a difference between men and
Practice Questions 3 1. Which of the following is an example of a discrete random variable? A) B) C) D) The distance you can drive in a car with a full tank of gas. The number of cows on a cattle ranch. The weight of a package at the post office. The
Practice Questions 4 1. The amount of time you have to wait at a particular stoplight is uniformly distributed between zero and two minutes. a. What is the probability that you have to wait more than 30 seconds for the light? A) B) C) D) 0.25 0.50 0.
Practice Questions 5 1. Random samples of size 36 are taken from an infinite population whose mean is 80 and standard deviation is 18. The mean and standard error of the sampling distribution of sample means are, respectively, A) B) C) D) 80 and 18 8
Practice Questions 4 1. The amount of time you have to wait at a particular stoplight is uniformly distributed between zero and two minutes. a. What is the probability that you have to wait more than 30 seconds for the light? A) B) C) D) 0.25 0.50 0.
Practice Questions 5 1. Random samples of size 36 are taken from an infinite population whose mean is 80 and standard deviation is 18. The mean and standard error of the sampling distribution of sample means are, respectively, A) B) C) D) 80 and 18 8
Dr. Valerie R. Bencivenga
Economics 329
Fall 2015
September 29, 2015
Information in [ ] is not required for a correct
answer. It is included to help students study.
MIDTERM EXAM #1: ANSWERS
1.a.
[Addition rule for 3 events]
P A B C P A P B P C P A B P A C
Dr. Valerie R. Bencivenga
Economics 329
PRACTICE HOMEWORK #1A: ANSWERS
1.a.
b.
c.
d.
e.
discrete
continuous
discrete (dummy)
discrete
continuous (or approximately continuous)
2.a.
b.
Mode. It does not make sense to average nuclear power plants and hydroel
NAME: _ EID: _
Dr. Valerie R. Bencivenga
Economics 329
April 5, 2016
You must turn in the exam questions at the end of the exam, in addition
to your answers, in order to receive an exam score. Only your blue exam
book will be graded.
MIDTERM EXAM #2
Instr
NAME: _ EID: _
Dr. Valerie R. Bencivenga
Economics 329
February 23, 2016
You must turn in the exam questions at the end of the exam, in addition
to your answers, in order to receive an exam score. Only your blue exam
book will be graded.
MIDTERM EXAM #1
I
Information that is in a blue box or that is
in [square brackets] is not required for a
full-credit answer.
Dr. Valerie R. Bencivenga
Economics 329
February 23, 2016
MIDTERM EXAM #1: QUESTIONS AND ANSWERS
(25 points)
1.
Below is the joint relative frequen
INTRODUCTION
Dr. V.R. Bencivenga
Economics 329
Economic Statistics
2011-12
INTRODUCTION
Outline
I.
Conceptual framework of statistics
Topics of the course
Objectives:
Descriptive statistics vs. statistical inference
Data-generating process
Randomness
II.
DESCRIPTIVE STATISTICS
Dr. V.R. Bencivenga
Economics 329
Economic Statistics
DESCRIPTIVE STATISTICSPART 1
Outline
Introduction
Objectives:
Distribution of a variable
Measures describing how values of a variable are
distributed, in a set of data
Measures o
DESCRIPTIVE STATISTICS
Dr. V.R. Bencivenga
Economics 329
Economic Statistics
DESCRIPTIVE STATISTICSPART 2
Outline
Objectives:
I. Covariance
Methods for describing how the distributions
of two variables are related
II. Correlation
III. Regression
What it m
Dr. V.R. Bencivenga
Economics 329
Spring 2011
Feb. 23, 2011
MIDTERM EXAM #1
Instructions: Answer the questions below in a blue book. The exam consists of ten questions worth a total of
210 points. The exam will last two hours. This is an open book, ope n
Practice Questions 2 Answers 1. a. C b. A 2. C 3. a. P(A) = 0.17 + 0.13 + 0.04 = 0.34 b. No, since P(A B) S. c. P( A ) =1 P(A) = 1 0.34 = 0.66 d. P(A B) = 0, since A and B are mutually exclusive events.
4. a. Event S: Supports US policy in Iraq,
Practice Questions 3 1. Which of the following is an example of a discrete random variable? A) B) C) D) The distance you can drive in a car with a full tank of gas. The number of cows on a cattle ranch. The weight of a package at the post office. The
Practice Questions 4 Answers 1. a. C b .B c. D d. A 2. a. C b. D c. B 3. a. B b. C 4. a. A b. D 5. a. D b. C 6. a. B b. A 7. a. D b. B c. C d. B e. A f. D g. A h. B i. C 8. a. D b. A 9. a. C b. A 10. B 11. B 12. D 13. A 14. C 15. D 16. A 17. C 18. B