A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 3​% 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 42​% of the respondents said they think Congress is doing a good or excellent job. ​(c) Compare the results from parts​ (a) and​ (b).     ​(a) What is the minimum sample size needed assuming that no prior information is​ available? n= ​(Round up to the nearest whole number as​ needed.) ​   (b) Find the minimum sample size​ needed, using a prior study that found that 42​% of the respondents said they think Congress is doing a good or excellent job. Answer=   ​(c) Compare the results from parts​ (a) and​ (b). Answer=

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of likely U.S.…

A: given data 95% ci for pE = 0.02n = ?

Q: If a hurricane was headed your way, would you evacuate? The headline of a press release states,…

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

Q: You wish to estimate, with 99% confidence, the proportion of all US adults who want more funding for…

A: Given data, E=4%=0.04 z-value at 99% confidence is Zc=2.576

Q: You wish to estimate, with 90% confidence, the proportion of tablet owners who use their tablets…

A: Solution: 1. From the given information, confidence level is 0.90 and E=0.02. Since the proportion…

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

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

Q: A researcher wishes to​ estimate, with 90​% ​confidence, the population proportion of likely U.S.…

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

Q: A researcher wishes to estimate, with 95% confidence, the population proportion of families who eat…

A: Answer: From the given data, 95% confidence interval, Margin of error (ME) =3% =0.03 P^= 16% = 0.16…

Q: O224 O 124 O238 176

A: GIVEN DATA, p=0.169CI=0.90α=1-0.90=0.10E=0.04

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

A:

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: women (combining employment and at-home work). Suppose a study was done to determine if the average…

A: (d) As the population standard deviation is not known, we will use t-distribution. tdf The…

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A: During a 1-week period, 147 customers were surveyed and 93% of them reported as being either…

Q: You wish to estimate, with a 99% confidence, the population proportion (p) of U.S adults who made…

A: Given: Margin of error (E)=0.042Confidence level (c)=0.99α=1-c   =1-0.99    =0.01Area=1-α2…

Q: A researcher wishes to estimate, with 93% confidence, the percentage of people who own a home…

A:

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who…

A:

Q: What is the minimum sample size needed assuming that no prior information is​ available? n= ___…

A: It is given that  Margin of error, E = 5% = 0.05 Confidence interval = 95%

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 researcher wishes to estimate, with 95% confidence, the population proportion of adults who…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.95.

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

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

Q: State the distribution to use for the test (Enter your answer in the form z or tar where af is the…

A: n =77mu = 80xbar = 83s = 10

Q: A researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who…

A: (a) The sample size is obtained below: From the given information, if the proportion value is…

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: In 1944​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: We habe to find given proportion.

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

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

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

Q: software system. In planning for the operating system that he will​ use, he needs to estimate the…

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: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

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: What is the variable of interest? Whether or not a patient is satisfied with the level of care.…

A: The objective of the question is to identify the variable of interest in a given scenario. The…

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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.…

A: Given that  Margin of error =E =4%=0.04 99% confidence level.

Q: As Director of Student Services for the Lake County School District, you wish to estimate the…

A: X=35, n=50

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…

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

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

Q: A politician wants to estimate the proportion of the voting population in the district who favor the…

A:

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

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.