The Mean of the Difference $\bar { X } _ { 1 } - \bar { X } _ { 2 }$

question 99

True/False

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

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