Use the sample data and confidence level given below to complete parts ( a ) through ( d ) . A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n= 978 and x= 544 who said "yes." Use a 95 % confidence level. A. Find the best point estimate of the population proportion. ( Round to three decimal places as needed. ) B. Identify the value of the margin of error E. (Round to three decimal places as needed) C. Construct a confidence interval.(Round to three decimal places as needed)

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