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two proportions. 0. Animal Bites of Postal Workers In Cleveland, all random sample of /3 mail carriers showed that 10 had been bitten by an

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two proportions. 0. Animal Bites of Postal Workers In Cleveland, all random sample of /3 mail carriers showed that 10 had been bitten by an animal during one week. In Philadelphia, in a random sample of 80 mail carriers. 16 had received animal bites. Is there a significant dif- ference in the proportions? Use a = 0.05. Find the 959% confidence interval for the difference of the two proportions

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