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A poll found that people from the north now have relatively warm feelings toward people from the south. A poll,
conducted by telephone among a random sample of 804 adults, found that 667 of those sampled consider the two
regions friends. The margin of error for the poll was plus or minus 2.6 percentage points (for a 0.95 confidence level).
Use this information to obtain a 95% confidence interval for the percentage of all northerners who consider the two
regions friends.
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Sagot :
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