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When you are doing a two-tailed test and find the p-value associated with your z statistic, you have to multiply the p value by 2.

When you are doing a two-tailed test and find the p-value associated with your z statistic, you have to multiply the p value by 2.

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Consider what the p value corresponds to: areas under a PDF. When it's 2-tailed, you are taking both the area of the curve to... View the full answer

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