Reading proficiency: An educator wants to construct a  99.9%  confidence interval for the proportion of elementary school children in Colorado who are proficient in reading.   Part: 0 / 3 0 of 3 Parts Complete   Part 1 of 3     (a) The results of a recent statewide test suggested that the proportion is  0.73 . 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  99.9%  confidence interval with a margin of error of  0.07

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Q: please redo the e because the answer was incorrect.

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