A random sample of 2000 voters in the United States were asked for their views on a wide range of political andsocial issues.a) → Only 482 felt very optimistic about future. Construct 90% C.I. for the proportion of all voters having thisopinion..b) 1800 felt that the United States was still the best country in the world. Construct 99% C.I. for the proportionof all voters having this opinion.

a) 90% confidence interval for the proportion of voters feeling very optimistic about the future is…

Answered: A random sample of 2000 voters in the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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C. In a sample of 993 recent car buyers, the participants are asked to identify the most useful source of information about the cars they purchase. The responses and their frequencies are listed in the table. Frequency Source Consumer guide Dealership 78 279 120 Word of mouth Internet 516 Based on this sample data, what percentage of car buyers have found either a dealership or the internet as the most useful source of information about the cars they purchase?
A survey of 125 freshmen business students at a local university produced the results listed below. How many students took only music? 30 took English;33 took math;32 took music;14 took English but not math;9 took math and music;12 took English and music;3 took all three
Suppose a researcher is surveying four subjects: subject A, subject B, subject C, and subject D. Subject A wants to impress the researcher above all else, while the other subjects do not care if they impress the researcher. Which subject is least likely to answer all the questions honestly? OA. Subject C O B. Subject D C. Subject A D. Subject B
Reports have found that many U.S. adults would rather live in a different type of community than where they are living. A national survey of 2260 adults asked: "Where do you live now?", and "What do you consider to be the ideal community?" Response options were City (C), Suburb (S), Small Town (T), or Rural (R). A representative portion of this survey for a sample of 100 respondents is as follows: Question 1: Where do you live now? S T R C R S S C S S T R S S T C C R T C S S C C S C T R R C T S S S S C S C S T T C S T C T C T C R C C R S C C R T C R T R S R T R T C S T T T C C S C S C T C S S T S C C R T T T T C C R T S C C R S Question 2: What do you consider to be the ideal community? S R C T T C T T C T S S S T T C T T C R S T C C S C T R C S T S T T R C T T R S C R T S R R R S C R T C S T T T T S T T S T R R T C C S R R R C T R S R T T T S C T S C T S S R T T C R T R T R R C R T EXCEL…
(Fill in the blank) Out of 850 people sampled, 595 said that they supported candidate Johnson. The researchers conclude that they are 95% confident that, in the population, the true percentage of people who support candidate Johnson is between 66% and 74%. Use this information to answer the following questions. a) The percentage of people in the sample who support candidate Johnson, called the sample statistic, is %. Answer: b) The margin of error is Answer: c) The confidence interval can be written as %+ Answer for first blank space: Answer for second blank space:
A survey was taken on course selection and gender. The results are represented in the table below. Вoys Girls TOTAL Band 27 17 44 Team Sports 64 46 110 Neither 13 9 22 ΤΟTAL 104 72 176 What percentage of those surveyed are boys AND taking Team Sports? Round to the nearest percent. % are boys and taking team sports.
USE THE FOLLOWING INFORMATION TO ANSWER THE NEXT TWO QUESTIONS. At a particular university, 60 % of the students who apply for admission are in-state residents, 30 % are from other states, and the remaining applicants are international students. 35 % of in-state applicants are admitted, 25 % of applicants from other states are admitted, and 20 % of international applicants are admitted. 13) What percent of applicants are admitted?
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A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. Undergraduate Major Graduate School Business Engineering Other Total Yes 33 43 61 137 No 90 105 68 263 Total 123 148 129 400 What percentage of the students' undergraduate major is Engineering? a. 65.75% b. 520% c. 152% d. 37%
Jessica Johnson is running for mayor of a small city in Florida. She needs at least 51% of the votes to win. Her campaign wanted to predict whether or not she’s going to win. She hires five people to ask 100 randomly selected voters if they will vote for her. The results are shown in the table. Should Jessica predict that she will win? Poll Number Yes Votes 1 51 2 68 3 58 4 43 5 65 Jessica should predict that she will ["", ""] because ["", "", ""]
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The nonprofit group Public Agenda conducted telephone interviews with three randomly selected groups of parents of high-school children. There were 202 black parents, 202 Hispanic parents, and 201 white parents. The sample survey asked the parents to respond to the statement, "A college education has become as important as a high school diploma used to be." Here are the counts of responses: Strongly agree Somewhat agree Somewhat disagree Strongly disagree TOTAL Black parents 154 27 11 10 202 Hispanic White parents 144 37 13 8 202 parents 125 50 18 8 201 Write a brief report on the similarities or differences among the three groups of parents in their attitudes towards the importance of a college education. Include a graph or graphs and a test of significance.

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