OO IDEAS Homework Help - Q&A from Onl + X C imathas.humber.ca/assess2/?cid =493&laid=14653#/skip/2 M : Apps HUMBER COLLEGE DO STAT1112 Reading list The manager of a newly opened book store wants to estimate the average expenditure 59mins X of his customers using a confidence interval. He estimates that the population standard deviation is approximately $25.00. (a) For a 98% confidence level, find the appropriate sample size necessary to achieve a margin of error of 3.00. Determine za = Round your answer (n) UP to the next whole number. The required sample size n is (b) For a 90% confidence level, find the appropriate sample size necessary to achieve a margin of error of 3.00. Determine za = Round your answer (n) UP to the next whole number. The required sample size n is (c) Compare parts (a) and (b). Select the correct statement. Type here to search O W 11:11 PM 1'C Cloudy ~ 91 3 7 1x 2022-03-15