Page 1 of 9 HomeworkGTwo Sample Hypothesis Testing
Homework 6
Two Sample Hypothesis Testing
(Questions not from the book)
Problem #1:
Suppose we want to conduct a hypothesis test to determine whether the average annual wage for an
advertising manager is
Page 1 of 6
Homework 1
Homework 1 ( from the 11th edition of the book)
Chapter 1 problems: 6, 10, 11;
6. Foreign Affairs magazine conducted a survey to develop a profile of its subscribers(Foreign Affairs
Website, February 23,2008).
The following question
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Homework5 One Sample Hypothesis Testing
Homework 5
One Sample Hypothesis Testing
(Questions not from the book)
1. The average annual total return for U.S. Diversified Equity mutual funds from 1999 to 2003 was 4.1%. A
researcher would like to
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Homework 2
Homework 2 Questions. ( from the 11th edition of the book)
Chapter 3: 19, 29, 63
Question 19: The Los Angeles Times reported the air quality index for various areas of southern California. A
sample of air quality index values for Po
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Homework 4
Homework 4 : Questions( from the 11th edition of the book)
Chapter 7: 15,43,45,52
Question 15: Many drugs used to treat cancer are expensive. BusinessWeek reported on the
cost per treatment of Herceptin, a drug used to treat breast
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Homework 3
Homework3 Questions
( from the 11th edition of the book)
Chapter 6 problems : 11,17,22,24
Question 11: Given that z is a standard normal random variable, compute the following probabilities
A) P(z < = 1.0)
B) P(z > = 1.0)
C) P(z >
1B:
With the same problem statement and using the pvalue method compute the pvalue, and
reach a statistical decision about the Null Hypothesis:
Using the TI ZTest option we find that pvalue=.0272.
Because pvalue=.0272 <= .05=alpha therefore we reject
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Homework6Two Sample Hypothesis Testing
Homework 6
Two Sample Hypothesis Testing
(Questions not from the book)
Problem #1:
Suppose we want to conduct a hypothesis test to determine whether the average annual wage for an
advertising manager is
Page 1 of 23
One sample Hypothesis TestingPractice ProblemsSolutionsSETA
Chapter 9 Practice Problems Solutions
SetA
Case I: Setting Up the Null and the Alternative Hypotheses
Case iProblem 1.
Suppose flour packaged by a manufacturer is sold by weight
MULTIPLE CHOICE QUESTIONS
1. The Central Limit Theorem is important in statistics because
1. _C_
A. for a large n, it says the population is approximately normal.
B. for any size sample, it says the sampling distribution of the sample mean is approximatel
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Final Exam Formulas
Formulas for Chapters 6, 7,8
N
n
xi
N
xi
( xi )2
n
( x x)
2
i
, x i 1 , 2 i 1
, s 2 i 1
N
n
N
n 1
X
X
Z
, We can solve for : X Z x , X Z x , x
x
Z
i 1
Z
X
where
x
Z
p p
where p
p
x
x
,
n
p (1 p)
( Know the three
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CHAPTER 7SAMPLING AND SAMPLING DISTRIBUTIONSSet A
MULTIPLE CHOICE
1.Parameters are
a. numerical characteristics of a sample
b. numerical characteristics of a population
c. the averages taken from a sample
d. numerical characteristics of eithe
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CHAPTER 6CONTINUOUS PROBABILITY DISTRIBUTIONSSetA

MULTIPLE CHOICE
1.The center of a normal curve is
a. always equal to zero
b. is the mean of the distribution
c. cannot be negative
d. is the standard deviation
2.The probability that a conti
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Multiple Linear Regression Practice ProblemsSETASolutions
1.
a.
b1=.5906isanestimateofthechangeinycorrespondingtoa1unitchangeinx1whenx2isheldconstant.
b2=.4980isanestimateofthechangeinycorrespondingtoa1unitchangeinx2whenx1isheldconstant.
b.
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CHAPTER 8INTERVAL ESTIMATION
Set D
1.The absolute value of the difference between the point estimate and the population parameter it
estimates is
a. the standard error
b. the sampling error
c. precision
d. the error of confidence
2.When s is u
CHAPTER 9HYPOTHESIS TESTS
MULTIPLE CHOICE
1.The sum of the values of and
a. always add up to 1.0
b. always add up to 0.5
c. is the probability of Type II error
d. None of these alternatives is correct.
2.What type of error occurs if you fail to reject H0
Course Project
Consumer Characteristics Research
Xiaowen Zhang
MGSC 2301
Professor D. Fotiadis
A. Introduction
This report is written to show the relationship between two consumer
characteristics, which are annual income and household size, and annual cre
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Answers to Interval Estimation; Sample Size Problemsset B
Set B
In equation 8.8, p* =p =population proportion
Solutions:
Case i:Confidence Interval for , sigma is known examples >Use Z
1.
a.
b.
2.
At 95%,
a.
32 1.645
32 1.4 or 30.6 to 33.4
b
Homework 4 Solutions
Chapter 7
10.
a. Finite population. A frame could be constructed obtaining a list of licensed drivers from the
New York state drivers license bureau.
b. Infinite population. Sampling from a process. The process is the production line