The expected value of $\bar { x } _ { 1 } - \bar { x } _ { 2 }$ is $E \left( \bar { x } _ { 1 } - \bar { x } _ { 2 } \right) = \mu _ { 1 } - \mu _ { 2 }$ .

Question

Quizplus · Accepted Answer

The expected value of the difference between two sample means is equal to the difference between the population means, assuming the samples are drawn from populations with means $\mu_1$ and $\mu_2$.

The Expected Value Of xˉ1−xˉ2\bar { x } _ { 1 } - \bar { x } _ { 2 }xˉ1​−xˉ2​

The Expected Value Of $\bar { x } _ { 1 } - \bar { x } _ { 2 }$