A researcher wishes to​ estimate, with 95​% ​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 32​% of the respondents said they eat fast food four to six times per week. ​(c) Compare the results from parts​ (a) and​ (b).

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: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The confidence level is 95% Therefore, α = 0.05 and α/2=0.025. The margin of error is 0.045 Since…

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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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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: 0.20 0.30 0.40 0.50 0.60 0.70 0.80 Simulated proportions of samples, n= 25 Using the dotplot, is…

A: From the given information we take 100 simulation of size 25 and the proprtion of head is 0.68.

Q: you want to obtain a sample to estimate a population proportion. based on previous evidence, you…

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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…

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Q: A restaurant chain would like to measure the proportion of customers who are generally satisfied…

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

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

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Given data, p=30%=0.30 E=0.1%=0.001 z value at 99.5% confidence is Zc=2.807 n=?

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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A: The sample proportion is calculated as: p^=xn=70200=0.35

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

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: (a) Estimate the number of visitors in the sample who actually are looking for the company's website…

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

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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: a. Construct a 90% confidence interval to estimate the actual proportion of mothers with…

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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

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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…

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

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

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: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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

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Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: We have given that  Population proportion p= 13%=0.13 Margin of error = 4.5% = 0.045 98 %…

Q: Determine the sample size needed to be 99% confident the population proportion estimate is within 3%…

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.