(1 point) A random sample of elementary school children in New York state is to be selected to estimate the proportion p who have received a medical examination during the past year. An interval estimate of the proportion p with a margin of error of 0.055 and 98% confidence is required. (a) Assuming no prior information about pis available, approximately how large of a sample size is needed? n = 161 (b) If a planning study indicates that pis around 0.7, approximately how large of a sample size is needed? n = 58