Courses
a Father and His Two Sons Played Golf at Four

Courses
A father and his two sons played golf at four different courses with the following scores:
$$\begin{array} { | l | c | c | c } & \text { Dad } & \text { Sam } & \text { Jeff } \\\hline \text { Course 1 } & 92 & 86 & 81 \\\hline \text { Course2 } & 95 & 86 & 87 \\\hline \text { Course 3 } & 88 & 81 & 83 \\\hline \text { Cuurse4 } & 90 & 87 & 90 \\\hline\end{array}$$
-Use a randomized block design to test for the difference of golf score means using $\alpha$ = 0.05 and using the courses as the blocking variable.
Calculate the block sum of squares.