Dog Bites to Postal Workers For a certain urban area, in a

Chapter 7, Problem 6

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Dog Bites to Postal Workers For a certain urban area, in a sample of 5 months, on average 28 mail carriers were bitten by dogs each month. The standard deviation of the sample was 3. Find the 90% confidence interval of the true mean number of mail carriers who are bitten by dogs each month. Assume the variable is normally distributed. (7–2)

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