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The Mean of the Difference Xˉ1−Xˉ2\bar { X } _ { 1 } - \bar { X } _ { 2 }

Question 95

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The mean of the difference Xˉ1−Xˉ2\bar { X } _ { 1 } - \bar { X } _ { 2 } is equal to the mean of the difference Xˉ2−Xˉ1\bar { X } _ { 2 } - \bar { X } _ { 1 } .

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