use a significance level of .01 to test the claim that the population mean is greather than 2.85. The sample data consists of 9 scores for which mean=3.1 and st. dev.=.52
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use a significance level of .01 to test the claim that the population mean is greather than 2.85. The sample data consists of 9 scores for which mean=3.1 and st. dev.=.52