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A research institute poll asked respondents if they felt vulnerable to identify theft. In the poll, n=928 and x=579 who said yes. Use a 90%

A research institute poll asked respondents if they felt vulnerable to identify theft. In the poll, n=928 and x=579 who said "yes." Use a 90% confidence level.

a) Find the best point estimate of the population proportion p.

b) Identify the value of the margin of error E.

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