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Which of the following statements about testing a hypothesis using a Z-test is least accurate? A. If the calculated Z-statistic lies outside the critical Z-statistic range, the null hypothesis can be rejected. B. The confidence interval for a two-tailed test of a population mean at the 5% level of significance is that the sample mean falls between ±1.96 σ/√n of the null hypothesis value. C. The calculated Z-statistic determines the appropriate significance level to use. |