A political candidate has asked you to conduct a poll to determine what percentage of people support her.a) Suppose the candidate believes that the percentage that support her is approximately 58%. If we want a 7% margin of error at a 94% confidence level, what size sample is needed? [Text Box]b) Suppose the candidate does not know what percentage of people support her. If the candidate wants a 7% margin of error at a 94% confidence level, what size of sample is needed? [Text Box]Round z-values to 2 decimals. Give your answers in whole people.

Given,margin of error (E)=0.07sample proportion (p^)=0.58α=1-0.94=0.06α2=0.03Z0.03=1.88 (from…

Answered: A political candidate has asked you to…

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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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 politician wants to know what percentage of the voters support her position on the issue of political dynasty. What size voter sample should be obtained to determine with 90% confidence the support level to within 4%? O a. 423 O b. 25 O c. 1691 d. 600 e. 21
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 95% confidence level, what size of sample is needed? Give your answer in whole people. 600
A poll taken this year asked 1047 adults whether they were fans of a particular sport and 38% said they were. last year, 33% of a similar-size sample had reported being fans of the sport. A) Find the margin of error for the poll take this year if one wants 90% confidence in the estimate of the percentage of adults.
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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 ["", "", ""]
2) The Director of NJ Division of Elections wants to determine the proportion of college students who vote in elections. In a random sample of 250 college students, it was found that 120 students voted in the last election. Construct a 95% confidence interval for the population proportion of college students who vote in elections. Interpret your results.

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