Question: Left-tailed test: a. z = 1.84 b. z = 1.25 We have given the value obtained for the test statistic, z, in a one-mean z-test.

Left-tailed test:
a. z = −1.84
b. z = 1.25
We have given the value obtained for the test statistic, z, in a one-mean z-test. We have also specified whether the test is two tailed, left tailed, or right tailed. Determine the P-value in each case and decide whether, at the 5% significance level, the data provide sufficient evidence to reject the null hypothesis in favor of the alternative hypothesis.

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