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A 2004 poll reported that 24% of people worried that they would be exposed to SARS. Find the approximate margin of error if (a) =115,

A 2004 poll reported that 24% of people worried that they would be exposed to SARS. Find the approximate margin of error if (a)=115, (b) =449, (c) =1994. Explain how the margin of error changes as n increases.

a. Find the approximate margin of error if =115.

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