Question: In hypothesis testing, we aim to reject the null hypothesis that the sample mean is equal to the population mean. Assuming an alpha level of

In hypothesis testing, we aim to reject the null hypothesis that the sample mean is equal to the population mean. Assuming an alpha level of .05 and a two-tailed test, what z-score would we need to obtain for a sample mean to show that it is significantly different from the population mean (i.e., that there is an effect)?

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