A researcher wishes to​ estimate, with ​90%onfidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true proportion.​(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 32% 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: Given data, E=4%=0.04 z-value at 99% confidence is Zc=2.576

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A: Solution: a. From the given information, p=0.60 and E=0.03. The confidence level is 0.95.

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A: The objective of the question is to determine the sample size required to estimate a population…

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A:

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A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45

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

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A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

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

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: From the provided information, Margin of error (E) = 0.05 Confidence level = 90% Assuming the sample…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Sol:- Given Margin of Error = E = 0.02 For 99% Confidence Interval  zα/2=2.576

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A: Given Information Error = 0.05 Confidence level = 0.95

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A: Given that  Margin of error =E =5%=0.05

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

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

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: a) Consider the proportion as 0.5. Computation of critical value: 1-α=0.95α=0.05α2=0.0251-α2=0.975…

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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:

Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

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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: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Given,Margin of error(E)=0.05α=1-0.90=0.1α2=0.05Z0.05=1.645

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

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Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Given data,E=3%=0.03Z-value at 90% confidence is Zc=1.645

Q: Many states are carefully considering steps that would help them collect sales taxes on items…

A: The following information is provided that is required to compute the minimum sample size:…