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Suppose the mean salary for full professors in the United States is believed to be $71,650. A sample of 15 full professors revealed a mean

Suppose the mean salary for full professors in the United States is believed to be $71,650. A sample of 15 full professors revealed a mean salary of $74,250 with a standard deviation of $5,000. Can it be concluded that the average salary has increased using a 1% level of significance

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