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12. A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sample of 15 teachers

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12. A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sample of 15 teachers from each district was randomly selected with a mean of $28,150 in the first district and $30,300 in the second. The standard deviation was $2300 in the first district and $2100 in the second district. Assume the populations are normal and the variances are unequal. Perform the hypothesis test by hand with a - 0.02

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