Question: Suppose you are interested in estimating the proportion of San Diegans between the ages of 18 and 40 who are able to purchase a home in the San Diego metropolitan area, where the median home price just reached $716,000. You would like to estimate the proportion with 90% confidence and a margin of error of 3%. How many San Diegans between 18 and 40 years old would you need to randomly sample to estimate this correctly?