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Using a random sample of 4800 TV households, a media research company found that 63.2% watched the final episode of a long-running popular series. The
Using a random sample of 4800 TV households, a media research company found that 63.2% watched the final episode of a long-running popular series. The margin of error in this percent was plus or minus1.4%. In a later study, the same media research company increased its random sample to 7500. By how much did this improve the margin of error
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