Using the sampling distribution determined for = (X1 + X2)/2 in Exercise 7.5, verify that E[]

Question:

Using the sampling determined for = (X1 + X2)/2 in Exercise 7.5, verify that E[] = μ and sd() = σ/√2. 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...