A researcher was interested in comparing the salaries of female and male employees at a particular company. Independent simple random samples of 8 female employees and 15 male employees yielded the following weekly salaries (in dollars). Female Male 495 722     518 760 562     904 556 880     1150 904 520     805 520 500     480 1005 1250     970 743 750     605 660 1640 Use a 0.01 significance level to test the claim that the mean salary of female employees is less than the mean salary of male employees.

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