a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum sample size​ needed, using a prior study that found that 28​% of the respondents said they think Congress is doing a good or excellent job. ​(c) Compare the results from parts​ (a) and​ (b).

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A: Interval means the boundary to the values. The minimum boundary is the lower limit and the maximum…

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A: 1. The expected frequencies are, Outcome Frequency Expected frequency Lane 1 88 328×14=82…

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A: Sample size = n = 4625 Sample proportion = p̂ = 0.32

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A: Formula for the sample size needed to estimate a population proportion is

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A: GivenConfidence level=90%Margin of error=1%=0.01

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A: Givenx=39n=334p^=xn=39334=0.116766Margin of error(E)=0.05Confidence…

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Q: A    national    polling    organization    wants    to    be    95%    confident    that    its…

A:

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A: a.It is given that x1=57, x2= 49, n1=3,294, n2= 1,648. .

Q: 3. A political scientist would like to estimate the proportion of voters who read their ballot…

A: To calculate: How large of a sample size does she need?

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

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A:

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A: Since you have posted multiple questions, we will provide the solution only to the first question as…

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A: Obtain the value of the minimum number of surveyed people. The value of the minimum number of…

Q: The IRS is concerned with improving the accuracy of tax information given by its representatives…

A: The formula to constructing the control limits for the p - chart is defined as follows…

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: given data   CI = 0.90, P ( - Z< P < Z ) = 0.90 therefore z = 1.645 ( =z table ) E = 6% =…

Q: The objective of statistical inference is to: a. Draw conclusions about population parameters from…

A: We need to answer, the objective of statistical inference is to: a. Draw conclusions about…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: A researcher wishes to​ estimate, with ​90%onfidence, the population proportion of adults who think…

A: Givenconfidence level(α)=90%Margin of error(E)=4%=0.04

Q: A pool of 500 Houston residents indicated that 16% of them participated in Women’s March on January…

A:

Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

A: The sample proportion is 0.30, margin of error is 0.06, and the confidence level is 98%. Computation…

Q: A poll taken this year asked 1015 adults whether they were fans of a particular sport and 62% said…

A: sample size (n)=1015  Proportion of this year (p) =0.62 Confidence level = 0.95α = 1- confidence…

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: In a 2021 poll by the Public Religion Research Institution, 2,508 Americans were asked if they agree…

A: Given: n = 2508 The margin of error E = 2.1 Formula Used: σ = EnZ

Q: b) A researcher wish to estimate, 95% confidence, the proportion of people who did not have a land…

A: The collection of all the units under consideration is called population. Some amount of population…

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A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: To determine the proportion of Americans who support affirmative action policies for minorities and…

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Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

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A: Given that The difference in the proportions of customes who indicated they were satisfied…

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A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: oward revisions in the health care system. The president wants the estimate to be within 0.02 of the…

A: The  population proportion (p) of people that supports  health care revisions is given as 0.61.  The…

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think…

A:

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A:

Q: You have been asked to estimate the proportion of households in Chicago that have two or more…

A: a) Given margin of error(ME)=4%=0.04 Confidence level=95% Significance level=5% The critical value…

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of likely U.S.…

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Q: A health organization wants to estimate the population proportion of Ohioans who have received the…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 99%

Q: A community is considering raising funds to pay for improvements to the community swimming pool. To…

A: Here given community leader survey patrons of community pool on Saturday afternoon

Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

A: population proportion (p) = 0.23 let, sample proportion = m and , number of samples to be collected…

Q: who live within 20 miles of the coast in high hurricane risk counties of eight southern states. In…

A: It is given that sample size (n) is 4,625 and p hat value is 1-0.32 = 0.68.

Q: If we construct a 95% confidence interval estimate for the true proportion of all Minnesota school…

A: here given, n = 200 sample proportion  =20200 = 0.1 here for z-critical use excel command…