A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 7% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 7% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.4: Collecting Data
Problem 3E
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Question
A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only wants a 7% margin of error at a 90% confidence level, what size of sample is needed? Give your answer in whole people.
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Introduction
For 90% confidence interval with 7% margin of error we have to find the required sample size .
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