Use the sample data and condence level given below to complete parts (a) through [d]. A research institute poll asked rapondents if they felt vulnerable to identity theft. In the poll, n =1t] and x = 513 who said "yes." Use a 99% condence level. Click the icon to view a table of z scores. 3] Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identity the value ofthe margin of error E. E : (Round to three decimal places as needed.) c] Constmct the condence interval