The following table provides the starting players of a basketball team and their heights

a. The population mean height of the five players is .

b. Find the sample means for samples of size 2.
A, B: $\bar{x}$ = .
A, C: $\bar{x}$ = .
A, D: $\bar{x}$ = .
A, E: $\bar{x}$ = .
B, C: $\bar{x}$ = .
B, D: $\bar{x}$ = .
B, E: $\bar{x}$ = .
C, D: $\bar{x}$ = .
C, E: $\bar{x}$ = .
D, E: $\bar{x}$ = .

c. Find the mean of all sample means from above:
$\bar{x}$ = .

The answers from parts (a) and (c)

A. are not equal
B. if they are equal it is only a coincidence.
C. should always be equal