Suppose that a market research firm is hired to estimate the percent of adults living in a large city who had their physical check-up within the last 12 months. Fifteen hundred randomly selected adult residents in this city are surveyed to determine whether they had annual physical. Of the 1000 people surveyed, 842 responded yes -they had their annual physical check-up within the last 12 months. The 95 percent confidence interval estimate for the true proportion of adult residents of this city who had their annual physical check-up within the last 12 months spans from 0.82 A (two decimals) through 0.865 A (three decimals)