Mathematical Statistics with Applications
7th Edition
ISBN: 9781133384380
Author: Dennis Wackerly; William Mendenhall; Richard L. Scheaffer
Publisher: Cengage Learning US
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Chapter 14.4, Problem 16E
A survey to explore the relationship between voters’ church-attendance patterns and their choice of presidential candidate was reported in the Riverside Press-Enterprise prior to the 2004 presidential election. Voters were asked how often they attended church services and which of the two major presidential candidates (George W. Bush or John Kerry) they intended to vote for in the election. The results of a similar survey are contained in the following table.
- a Is there sufficient evidence to indicate dependence between reported frequency of church attendance and choice of presidential candidate in the 2004 presidential election? Test at the .05 level of significance. Place bounds on the attained significance level.
- b Give a 95% confidence interval for the proportion of individuals who report attending church at least once per week.
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Submit QuestionQuestion 9
In a 2018 study, Phoenix Marketing International identified Bridgeport, Connecticut; San Jose, California; Washington, DC; and Lexington Park, Maryland, as the four U.S. cities with
the highest percentage of millionaires (Kiplinger website). Consider a sample of data that show the following number of millionaires for samples of individuals from each of the four
cities.
City
Bridgeport,
San Jose,
Washington,
Lexington Park,
Millionaire
CT
CA
D.C.
MD
Yes
45
35
35
32
No
455
265
365
368
a. What is the estimate of the percentage of millionaires in each of these cities (to 1 decimal)?
Bridgeport,
San Jose,
Washington,
Lexington Park,
CT
CA
D.C.
MD
Percentage, %
b. Using a = 0.05 level of significance, test for the equality of the population proportion of millionaires for these four cities. What is the p-value?
Compute the value of the x test statistic (to 3 decimals).
Use Table 3 of Appendix B to find the p-value.
The p-value is - Select your answer -
- Select your answer-
What is your c…
Chapter 14 Solutions
Mathematical Statistics with Applications
Ch. 14.3 - Historically, the proportions of all Caucasians in...Ch. 14.3 - Prob. 2ECh. 14.3 - Prob. 3ECh. 14.3 - Prob. 4ECh. 14.3 - Prob. 5ECh. 14.3 - Prob. 6ECh. 14.3 - Prob. 7ECh. 14.3 - Prob. 8ECh. 14.3 - Prob. 9ECh. 14.3 - Prob. 10E
Ch. 14.3 - The data in the following table are the frequency...Ch. 14.4 - On the 40th anniversary of President John F....Ch. 14.4 - A study was conducted by Joseph Jacobson and Diane...Ch. 14.4 - Suppose that the entries in a contingency table...Ch. 14.4 - A survey to explore the relationship between...Ch. 14.4 - Prob. 17ECh. 14.4 - Prob. 18ECh. 14.4 - The results of a study suggest that the initial...Ch. 14.4 - Refer to Exercise 14.10. Test the hypothesis, at...Ch. 14.4 - An interesting and practical use of the 2 test...Ch. 14.5 - A study to determine the effectiveness of a drug...Ch. 14.5 - The 2 test used in Exercise 14.22 is equivalent to...Ch. 14.5 - How do Americans in the sandwich generation...Ch. 14.5 - Does education really make a difference in how...Ch. 14.5 - A manufacturer of buttons wished to determine...Ch. 14.5 - Traditionally, U.S. labor unions have been content...Ch. 14.5 - Prob. 29ECh. 14.5 - Refer to Exercise 14.29. Estimate the difference...Ch. 14.5 - A survey was conducted to investigate interest of...Ch. 14 - Prob. 32SECh. 14 - A survey was conducted to determine student,...Ch. 14 - How would you rate yourself as a driver? According...Ch. 14 - Prob. 35SECh. 14 - Knee injuries are a major problem for athletes in...Ch. 14 - It is often not clear whether all properties of a...Ch. 14 - Prob. 39SECh. 14 - Prob. 40SECh. 14 - Prob. 41SECh. 14 - Prob. 42SECh. 14 - Prob. 43SE
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