A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 10% margin of error at a 90% confidence level, what size of sample is needed?

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: In a recent poll, 360 people were asked if they liked dogs, and 92% said they did. Find the margin…

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Q: In a recent poll, 410 people were asked if they liked dogs, and 85% said they did. Find the margin…

A: Given that, p^=0.85n=410 Critical value: By using the z-tables, the critical value at 1% level of…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: In this question, It has been given that Margin of error = 0.05 and level of significance = 0.005.…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given :  A political candidate has asked you to conduct a poll to determine what percentage of…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: It is given that the margin of error (E) is 0.08.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: GivenMargin of Error(E)=0.03Confidence Interval(c)=90%Let p^=0.5α=1-0.90=0.10α2=0.05zα2=z0.05=1.6449…

Q: The newspaper conducted a survey and asked some of the city's voters which candidate they preferred…

A: For the given confidence interval, the margin of error, E is:

Q: If n=330 and p (p-hat) =0.92, find the margin of error at a 99% confidence level Give your answer to…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: The formula for the sample size is as follows: Here, zα/2 is the critical value at 99% confidence…

Q: If, based on a sample size of 850​, a political candidate finds that 479 people would vote for him…

A: Given that  n=850 , X=479 Find 95​% confidence interval for his expected proportion of the​ vote?

Q: Suppose a simple random sample of 700 was taken from a large population. The sample had 32%…

A: Note:Hey, since there are multiple sub-parts question posted, we will answer first three sub-parts.…

Q: If n=160 and ˆp (p-hat) =0.48, find the margin of error at a 99% confidence level

A: Given Data: p^=0.48n=160   We know that, p^-pp^(1-p^)n~ Normal(0,1)

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Determine the size of sample is needed. The size of sample is needed is obtained below as follows:…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: It is given that the confidence level is 0.90 and margin of error (E) is 0.01.

Q: In a recent poll, 150 people were asked if they liked dogs, and 55% said they did. Find the margin…

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Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll,…

A: Given , n = 1008 x = 598

Q: 2. A researcher wants to estimate the daily expenses of college students. He wants a 95% confidence…

A: We have given that,  Population standard deviation (σ) = 99.50, margin of error (E) = 45 and…

Q: in a recent poll, 220 people were asked if they liked dogs, and 36% said they did . find the margin…

A:

Q: n a recent poll, 500 people were asked if they liked dogs, and 92% said they did. Find the margin of…

A: Given data, n=500 p=92%=0.92 Z value at 90% confidence is Zc=1.645 margin of error(E)=?

Q: In a recent poll, 260 people were asked if they liked dogs, and 67% said they did. Find the margin…

A: Given: p = 67%=0.67 n= 260 The value of z at a 90% confidence level is 1.645, which can be found by…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: We have to find correct answer..

Q: If the candidate only wants a 6% margin of error at a 99% confidence lev

A: Given that, The margin of error (E) is 0.06. Assume that p as 0.5.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given :                 Margin of error =0.05confidene level=0.995   Here p is not mentioned hence…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: If n=570 and ˆpp^ (p-hat) =0.8, find the margin of error at a 95% confidence level

A: given that, n = 570 p^=0.8 confidence level = 95%

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given observation Error = 10% = 0.1 Confidence level = 0.99

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: To find: The sample size needed.

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: If n=14, (x-bar)-33, and s=9, find the margin of error at a 98% confidence level Give your answer to…

A: We have given that, Sample mean (x̄) = 33, standard deviation (s)= 9 and sample size (n) = 14  Then,…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Here,…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Solution: From the given information, confidence level is 0.90 and E=0.06.

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given:Margin of error (E) = 0.09Confidence level = 90%Since, the proportion of people that support…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Find z-critical value:…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Solution: From the given information, confidence level is 0.995 and E=0.025. Since the proportion…

Q: A random sample of accountants were asked whether they double-check their calculations on a tax…

A: Here the sample proportion is given by, p^ Therefore α level confidence interval is given by, p^ -…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: Solution: Given information: n= 500 Sample size Here we need to interpret the meaning of each…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Here, there is no information about the population parameter. Hence, use the conservative estimate…

Q: In a recent poll, 110 people were asked if they liked dogs, and 40% said they did. Find the margin…

A: For 99% confidence intervalα=1-CI=1-0.99=0.01So, zα2=z0.012=z0.005=2.576

Q: After surveying 625 potential voters polled, you find out that 325 support candidate X and 300…

A: The sample proportion confidence interval is, p^±Zp^(1-p^)nwhere, p^ = the sample proportion…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Provided information is, a political candidate asked to conduct a poll to determine what percentage…

Q: You read about a survey in a newspaper and find that 70% of the 250 people sampled prefer Candidate…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: As there is no any estimates available, the sample proportion is assumed to be 0.50, that is,…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: ays before the 2016 presidential election, a Loras College poll asked 500 randomly selected likely…

A: The confidence interval indicate that true proportion of voters who favor Donald Trump is 43% which…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given dataError = 2.5% = 0.025Confidence level = 0.995Significance level = α=1-0.995=0.005

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.