Part 1 of 3 a The results of a recent statewide test

Last updated: 4/29/2023

Part 1 of 3 a The results of a recent statewide test suggested that the proportion is 0 62 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 743 elementary school children is needed to obtain a 99 5 confidence interval with a margin of error of 0 05 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 99 5 confidence interval with a margin of error of 0 05 80