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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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 44% of the respondents said they eat fast food four to six times per week.
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. Find the minimum sample size needed, using a prior study that found that 78% of the respondents said they support labeling legislation for GMOs.
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A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 22% 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).
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A researcher wishes to estimate, with 90% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). 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 83% of the respondents said they support labeling legislation for GMOs. (c) Compare the results from parts (a) and (b).
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Find the minimum sample size required to estimate the proportion of the population that supports a political candidate if the required margin of error is 0.042 and the level of confidence is 90%
A researcher wishes to estimate, with 99% confidence, the population proportion of motor vehicle fatalities that were caused byalcohol-impaired driving. His 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 24% of motor vehicle fatalities that were caused byalcohol-impaired driving. (c) Compare the results from parts (a) and (b).
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according to the university of nevada center for logistics Management, 6% of all merchandise sold in the united States gets returned. a Houston department store sampled 80items sold in January and found that 12 of the items were returned.a. construct a point estimate of the proportion of items returned for the population ofsales transactions at the Houston store