Instruction 19-4
the Director of the MBA Program of a University

Instruction 19-4
The director of the MBA program of a university wanted to know if a one week orientation would change the proportion among potential incoming students who would perceive the program as being good.Given below is the result from 215 students' view of the program before and after the orientation.
After the Orientation
$$\begin{array} { | l | l | l | l | } \hline \text { Before the Orientation } & \text { Good } & \text { Not Good } & \text { Total } \\\hline \text { Good } & 93 & 37 & 130 \\\hline \text { Not Good } & 71 & 14 & 85 \\\hline \text { Total } & 164 & 51 & 215 \\\hline\end{array}$$
-Referring to Instruction 19-4,the Friedman rank test is valid only if the 5 blocks are independent so that the yields in one block have no influence on the yields in any other block.