Question: In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income. How many respondents would be needed to calculate a 95% confidence interval(CI) (for the proportion of people who favor an elimination of taxes on dividend income) that has a total width no greater than 4% (i.e., the estimate must be within +/-2% of the true population proportion)? 2398, 600,1689, or the answer cannot be determined from the information provided?