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review 13 13) A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians

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13) A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with a standard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100. Construct a 95% confidence interval for the difference of the two means. Interpret

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