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The Tampa Bay (Florida) Area Chamber of Commerce wanted to
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The Tampa Bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of nurses was larger than that of school teachers. To investigate, they collected the following information on the
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amounts earned last week by a sample of school teachers and nurses. School teachers ($) 845 826 827 875 784 809 802 820 829 830 842 832 Nurses ($) 841 890 821 771 850 859 825 829 Is it reasonable to conclude that the mean weekly salary of nurses is higher? Use the .01 significance level. Hint: For the calculations, assume
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the nurses as the first sample. (1) What is the decision rule? (Round your answer to 3 decimal places.)
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(2) What is the test statistic? (Round your answer to 3 decimal places.)
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11/15/2010
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