a researcher would like to estimate the proportion of all children that have been diagnosed with autism spectrum disorder (asd) in their county. they are using 97% confidence level and the cdc national estimate that 1 in 68 ≈ 0.0147 children are diagnosed with asd. what sample size should the researcher use to get a margin of error to be within 1.5%? round up to the nearest integer, do not include decimals. answer