Find $\overline { \mathrm { d } } .$ Assume the Samples Are Random and Dependent, and the Populations

Multiple Choice

Find $\overline { \mathrm { d } } .$ Assume the samples are random and dependent, and the populations are normally distributed. $$\begin{array} { c | c c c c c } \mathrm { A } & 13 & 11 & 30 & 26 & 14 \\\hline \mathrm { B } & 11 & 7 & 8 & 18 & 5\end{array}$$

A) 9.0
B) -5.1
C) 33.1
D) 25.2