Reading proficiency: An educator wants to construct a 99% confidence interval for the proportion of...
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Reading proficiency: An educator wants to construct a 99% 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 0.71. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.07 ?A sample of elementary school children is needed to obtain a 99% confidence interval with a margin of error of 0.07.Part: 1/3Part 2 of 3(b) Estimate the sample size needed if no estimate of P is available.A sample of 340 elementary school children is needed to obtain a 99% confidence interval with a margin of error of 0.07.
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