42) A marketing company selected a sample of 25 lawyers and 25 doctors to determine ifthey had voted in the last election. At a 0.05, test the claim that the proportions whovoted are equal.42)LawyersDoctorsVoted171213Did not vote82525TotalA) There is not evidence to reject the claim that the proportions are equal because thetest value 2.053 < 3.841B) There is not evidence to reject the claim that the proportions are equal because thetest value 2.053 < 9.488) There is evidence to reject the claim that the proportions are equal because the testvalue 9.488 > 0.821D) There is evidence to reject the claim that the proportions are equal because the testvalue 3.841 > 0.821

Given observed data and calculation of row total, column total and grand total is shown below

Answered: 42) A marketing company selected a…

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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14) You want to estimate the percentage of customers who prefer name brand prescription drugs to generic prescription drugs within 0.035 with 95% confidence. What is the minimum sample size needed to do this? a) 530 b) 753 c) 282 d) 553 e) 784
A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 541 likely voters indicated that 53% would vote in favor. The reporter goes on to say that the margin of error for this poll was 5%. Complete parts a and b below. a) Explain why the poll is actually inconclusive. Choose the correct answer below. O A. The poll is inconclusive because the standard error of the sample proportion is less than 0.50. O B. The poll is inconclusive because the margin of error is too large. OC. The poll is inconclusive because the sample size is too small. O D. The poll is inconclusive because 50% is included in the confidence interval. b) What confidence level did the pollsters use? The pollsters used a % confidence level.
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A service provider company claims that its advertising strategy attracts 40% of young people. A client of that company suspects that it is less. The client will decide no longer to hire the advertising company if, when choosing a random sample of 20 young people, the result is within the lower extreme 5%. When doing the sampling, the client obtained that 8 young people were attracted by the advertising. Will the client rehire the advertising company? fill in the blanks spaces. a)H0: __________ (=,<,>,different) .40 . b)H1: ___________ (=,<,>,different) .40 . c)Find the Xo that corresponds to the extreme 5% according to the problem, in the rejection zone: ___________. .
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