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For a public opinion poll for a close presidential
Chapter 7, Problem 7E(choose chapter or problem)
QUESTION:
PROBLEM 7E
For a public opinion poll for a close presidential election, let p denote the proportion of voters who favor candidate A. How large a sample should be taken if we want the maximum error of the estimate of p to be equal to
(a) 0.03 with 95% confidence?
(b) 0.02 with 95% confidence?
(c) 0.03 with 90% confidence?
Questions & Answers
QUESTION:
PROBLEM 7E
For a public opinion poll for a close presidential election, let p denote the proportion of voters who favor candidate A. How large a sample should be taken if we want the maximum error of the estimate of p to be equal to
(a) 0.03 with 95% confidence?
(b) 0.02 with 95% confidence?
(c) 0.03 with 90% confidence?
ANSWER:
Step 1 of 4
Given:
Formula sample size:
