om According to a study, 80% of financial institutions use chun rute (utrition) to gauge the effectiveness of their maringot. Conto para iwand (1) a. you conduct a follow-up study to estimate the population proportion of financial institutions that use chum cate to guage the effectiveness of that murheting emots, would you use ***080 x 0.30 in the area on korrus? A US 0.66 because the value is an educated estimate of B. Us 0.6 because this value will produce the greater samples OC. Usex0.50 because this value wil produce the greater sample size OD. U 0.50 because this value is an educated estimate of b. Using your answer to (a). And the samplesite necessary to estimate with 90% confidence, e population proportion to within 10.02 The sample size needed is (Round up to the nearest Integer)