Let X11, X12, . . . , X1n1 be a random sample with sample mean X1 from

Question:

Let X11, X12, . . . , X1n1 be a random sample with sample mean X1 from a normal population with mean μ1 and variance σ12 , and let X21, X22, . . . , X2n2 be a random sample with sample mean X-bar2 from a normal population with mean μ2 and variance σ22 . Assume the two samples are independent. Show that the sampling of X-bar1 – X-bar2) is normal with mean μ1 – μ2 and variance σ12 / n1 + σ22 / n2. Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...