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4) A Federal regulatory agency states that the permanence of people in hospitals exceeds 5 days. If a planning value for the variance of 3.1

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4) A Federal regulatory agency states that the permanence of people in hospitals exceeds 5 days. If a planning value for the variance of 3.1 days is used. What sample size is needed for a 10% significance level and a 5% guarantee when the true average length of stay is 5.5 days

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