Question: To construct a confidence interval for the difference between two population means , - H2, use the formula shown below when both population standard deviations

To construct a confidence interval for the difference between two population means , - H2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n, 2 30 and n2 2 30. Also, the samples must be randomly selected and independent. (x1 - X2) - Ze my + my

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