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Inferential Statisticseasy
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If a test statistic follows a standard normal distribution and results in a value of z=−2.15z = -2.15z=−2.15, what is the rejection region for a left-tailed test at α=0.05\alpha = 0.05α=0.05 (critical value zcrit=−1.645z_{crit} = -1.645zcrit​=−1.645)?