If the critical values of the test statistic z are $\pm$1.96,they are the dividing points between the areas of rejection and non-rejection.

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This statement is true. The critical values determine the boundaries between the rejection region and acceptance region of the null hypothesis. In a z-test, the critical values correspond to a significance level of 0.05, which yields a critical value of ±1.96.

If the Critical Values of the Test Statistic Z Are ±\pm±

If the Critical Values of the Test Statistic Z Are $\pm$