Use the sample data and condence level given below to complete parts (a) through {d}. A research institute poll asked respondents ii theyr felt vulnerable to identity then. In the poll, n 2983 and x 2569 who said "yes." Use a 95% condence level. E Click the icon to view a table ofz scores. a} Find the best point estimate of the population proportion p. 0.5?!) (Round to three decimal places as needed.) l3) identifyr the value of the margin of error E. E=D (Round to three decimal places as needed.)