Reading proficiency: An educator wants to construct a 99.8% confidence interval for the proportion of elementary school children in Colorado who are proficient in reading. Part: 0 / 3 Part 1 of 3 (a) The results of a recent statewide test suggested that the proportion is 0.64. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05? A sample of elementary school children is needed to obtain a 99.8% confidence interval with a margin of error of 0.05.
Reading proficiency: An educator wants to construct a 99.8% confidence interval for the proportion of elementary school children in Colorado who are proficient in reading. Part: 0 / 3 Part 1 of 3 (a) The results of a recent statewide test suggested that the proportion is 0.64. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05? A sample of elementary school children is needed to obtain a 99.8% confidence interval with a margin of error of 0.05.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:Reading proficiency: An educator wants to construct a 99.8% confidence interval for the proportion of elementary school children in
Colorado who are proficient in reading.
Part: 0 / 3
Part 1 of 3
(a) The results of a recent statewide test suggested that the proportion is 0.64. Using this estimate, what sample size is needed so
that the confidence interval will have a margin of error of 0.05?
A sample of
elementary school children is needed to obtain a 99.8% confidence interval with a
margin of error of 0.05.
Transcribed Image Text:How's the economy? A pollster wants to construct a 90% confidence interval for the proportion of adults who believe that economic
conditions are getting better.
Part: 0 / 2
Part 1 of 2
(a) A poll taken in July 2010 estimates this proportion to be 0.24. Using this estimate, what sample size is needed so that the
confidence interval will have a margin of error of 0.05?
A sample of
adults is needed to obtain a 90% confidence interval with a margin of error of 0.05.
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