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A 95% confidence interval for a population proportion yielded the interval (.345, .455). a)Compute the margin of error (please show work). b)Compute the sample proportion

A 95% confidence interval for a population proportion yielded the interval (.345, .455).

a)Compute the margin of error (please show work).

b)Compute the sample proportion (please show work).

c)Will a 90% confidence interval be wider or narrower? Explain

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