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The Expected Value of the Sampling Distribution Of Xˉ1Xˉ2\bar { X } _ { 1 } - \bar { X } _ { 2 }

Question 3

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The expected value of the sampling distribution of Xˉ1Xˉ2\bar { X } _ { 1 } - \bar { X } _ { 2 } is μgˉ1xˉ2=μ1μ2\mu _ { \bar { g } _ { 1 } } - \bar { x } _ { 2 } = \mu _ { 1 } - \mu _ { 2 } where μ\mu i is the mean of population i (i = 1, 2).

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