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 5% 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 20% of the respondents said they eat fast food four to six times per week. (c) Compare the results from parts (a) and (b).

Q: Find the sample​ size, n, needed to estimate the percentage of adults who have consulted fortune…

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

A:

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

A: Given that  Margin of error =E =0.04 95% confidence .

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

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

A: We have given that  Margin of error =E =5%=0.05 Population proportion p=73%=0.73 95% confidence.

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: A company produces men’s jeans that can be styled with either a regular cut or a boot cut. In an…

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

A: Here we need to find the sample size required in both the cases and compare the two results.

Q: 4% of the true proportion. A researcher wishes to estimate, with 90% confidence, the population…

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

A:

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: Margin of Error 3 unit Confidence Level Required Sample Size 99% 95% 0.7 unit 90% 2.05 unit

A: The Cochran's formula is used to determine the minimum sample size for the estimation of population…

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

A:

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

A:

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle…

A: The question is about sample size estimation Given : Confidence level = 0.90 Estimate is within 4 %…

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

A: Given Data : Margin of error: ME = 0.03 confidence level: c= 0.95…

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

A: The formula for sample size is :n=Zc2p(1-p)E2 Given : E = 2%=0.02 Confidence level = 95% Zc=1.96

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

A: Given data; Margin of error  = 0.05 Confidence level  = 95% If preliminary estimate of population…

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of motor vehicle…

A: The independent variable is motor vehicle fatalities that were caused by​alcohol-impaired driving.…

Q: A researcher wishes to estimate, with 90% confidence, the population proportion of motor vehicle…

A: Area on each tail for two-tail tests. Refer Standard normal table/Z-table OR use excel function…

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

A:

Q: A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of adults who…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

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

A: Solution We will use z critical value to calculate the sample size.

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: 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) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum…

A: Here use Margin of error formula

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

A: Given,margin of error(E)=0.03α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: A researcher wishes to estimate, with 92% confidence, the population proportion of families who eat…

A: Population proportion p=18%=0.18 Margin of error =E =0.07

Q: (a) No preliminary estimate is available. Find the minimum sample size needed. ​(b) Find the minimum…

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Q: Sample size. A pollster wishes to estimate,with 95% confidence, the proportion of people who believe…

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: (a) What is the minimum sample size needed assuming that no prior information is available? n =…

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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: C. Find the sample size for each of the following: 1. 90% confidence, E = 0.005, p = 0.25 2. 95%…

A: as per our company guidelines we are able to answer only first 3 sub-parts. Kindly repost other…

Q: A researcher wishes to estimate, with 99% confidence, the population proportion of families who eat…

A: Population proportion p=16%=0.16 Margin of error =E =5%=0.05

Q: a) What is the minimum sample size needed assuming that no prior information is available? O (Round…

A: When nothing is given assume p = 0.5

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

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Q: Use the given data to find the minimum sample size required to estimate a population proportion or…

A: The random variable X follows normal distribution. We have to find the sample size. This is z-test…