A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% of the population 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 38% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? (Round up to the nearest whole number as needed.)

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

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Q: A researcher wishes to estimate, with 95% confidence, the population proportion of motor vehicle…

A: (a)   Obtain the minimum sample size with no prior information available.   The minimum sample size…

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A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

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A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: nple of size 9, degrees of freedom is equal to

A: The degrees of freedom can be calculated as:  DF = n-1 Here, n = sample size

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

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Q: ninimum sample size n n

A: Given :  Margin of error=E=3%=0.03 Significance level=α=0.10 Estimate of the proportion =p-hat=0.25…

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A:

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

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Q: You want to obtain a sample to estimate the percentage of college students in the U.S. that get a…

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

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: ate the proportion of households with two cars. How large a sample is needed in order to be 95%…

A: Following information is given: Confidence level = 95% Prior estimate of population proportion = 40%…

Q: Suppose you know that the population variance for the weight of tractors is 4,000,000. What sample…

A:

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: Suppose you wish to determine the proportion of college students in your state who receive some form…

A:

Q: c)   If the scientists want to estimate the proportion of deer that carry Lyme disease ticks to…

A: We have given that,  Margin of error (E) = 0.02 and confidence level = 90% Then,  We will find the…

Q: Calculate the minimum sample size that you must have to meet these requirements.

A: Let p be the pop. prop. of college students in the state who receive the form of financial aid.Given…

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

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 researcher wishes to​ estimate, with 80​% ​confidence, the population proportion of adults who…

A: The confidence level is 80%, and margin of error is 2%. There is no preliminary estimate.

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

A:

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: since estimate for proportion is not known therefor we take p⏞=0.5 margin of error=E= 0.03 level of…

Q: estimate the proportion of residents of a certain city and its suburbs who favor the construction of…

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

Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: Given, p=68%=0.68, c=0.99 and E=1.5%=0.015.

Q: If you want to be 99% confident of estimating the population proportion to within a sampling error…

A: Answer:- Given, Confidence level, C = 99% = 0.99Error, E = 0.06Population proportion, p = 0.43 Using…

Q: The “promotions manager” of a large cosmetics manufacturer wanted to investigate user acceptance…

A: The objective of the question is to identify the best statistical estimate for the proportion of all…

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Margin of Error ME= 0.06 Confidence level c= 0.90

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Confidence level = 0.95, margin of error = E = 0.08.

Q: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

Q: ‘In 1996, 31% of students reported that their mothers had graduated college. In 2000, the percentage…

A: The formula to calculate z-test statistic for proportion is given by,  ztest = (p̂ – p)/√[p(1–p)/n]…

Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…

A: Given  pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20