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 4% 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). ...... (a) What is the minimum sample size needed assuming that no prior information is available? n3D (Round up to the nearest whole number as needed.)
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 4% 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). ...... (a) What is the minimum sample size needed assuming that no prior information is available? n3D (Round up to the nearest whole number as needed.)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Answer these question A,B and C
![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 4% 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).
(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.)
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This problem requires calculating sample sizes needed for estimating population proportions with a given level of confidence and margin of error. The tasks include determining these sizes without prior information and using historical data to inform the estimates.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdabeff17-6e30-4e7b-b604-e664e91c4527%2F09ffa990-549e-4349-af8e-f0ceceea4c4e%2F9i3028_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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 4% 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).
(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.)
---
This problem requires calculating sample sizes needed for estimating population proportions with a given level of confidence and margin of error. The tasks include determining these sizes without prior information and using historical data to inform the estimates.
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