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A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 20 librarians from each city

A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 20 librarians from each city was randomly selected. The mean from the first city was$25,900with a standard deviation of$2100.The mean from the second city was$31,300with a standard deviation of$2200.Construct a95%confidence interval for12

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