Question 7 of 10 (1 point) Attempt 1 of 1 View question in a popup | 1h 17m Remaining 7.3 Section Reading proficiency: An educator wants to constructa 99.9% 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 0.61. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.04? A sample of elementary school children is needed to obtain a 99.9% confidence interval with a margin of error of 0.04