In testing the population mean, a left-tailed test has a test statistic of Z = -2.72....

 

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In testing the population mean, a left-tailed test has a test statistic of Z = -2.72. Which is the correct critical value, if we use a=0.005: * (2 Points) 2.576 -2.576 1.645 O -1.645 In testing the population mean, a left-tailed test has a test statistic of Z = -2.72. Which is the correct critical value, if we use a=0.005: * (2 Points) 2.576 -2.576 1.645 O -1.645