Mathematics, 06.10.2019 19:20 royaltyy6533
Astudy was conducted to determine if the salaries of firefighters from two neighboring cities were different. a sample of 75 firefighters from each city was randomly selected. the mean from the first city was $38,200 with a population standard deviation of $3100. the mean from the second city was $40,150 with a population standard deviation of $3300. construct a 99% confidence interval for μ1 - μ2.
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