(b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school children is needed to obtain a 95% confidence interval with a margin of error of 0.06.
(b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school children is needed to obtain a 95% confidence interval with a margin of error of 0.06.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Reading proficiency: An educator wants to construct a 95% confidence interval for the proportion of elementary school children
in Colorado who are proficient in reading.
Part 1 of 3
(a) The results of a recent statewide test suggested that the proportion is 0.65. Using this estimate, what sample size is
needed so that the confidence interval will have a margin of error of 0.06?
A sample of 243 elementary school children is needed to obtain a 95% confidence interval with a margin of error of 0.06.
Part: 1/3
Part 2 of 3
(b) Estimate the sample size needed if no estimate of p is available.
A sample of
elementary school children is needed to obtain a 95% confidence interval
with a margin of error of 0.06.
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