Chapter 12, Problem 31SE

a.

To determine

Calculate the value of $E\left(Y_{ij}\right)$.

b.

To determine

Find the values of $E\left({\overline{Y}}_i\right)$ and $V\left({\overline{Y}}_i\right)$.

c.

To determine

Calculate the values of $E\left(\overline{D}\right),V\left(\overline{D}\right)$.

Also find the probability distribution of $\overline{D}$.