Determine the critical value or values for a one-mean z-test at the 5% significance level if the hypothesis test is left-tailed ( Z0.025 Ζο.01 Z0.005 1.282 1.645 1.9602.326 2.576 Select the correct answer below: O -1.645 O 1.645 O 1.96 O 1.96 and -1.96 1.645 and -1.645

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