Data Set 14-4:Each of the Following Represent Data for a Chi

Data Set 14-4:Each of the following represent data for a chi square test of independence. $\begin{array}{rlllllllll}\mathrm{W} & \mathrm{X} & \mathrm{Y} & \mathrm{Z}\\3 \quad 1 & 15 \quad 45 & 10 \quad 20 \quad 30 & 15 \quad 18 \quad 24 \\25 \quad 2 & 40 \quad 10 & 30 \quad 20 \quad 10 & 21 \quad 35 \quad 40 \\25 \quad 3 & \quad & \quad \quad & 18 \quad 20 \quad 25\end{array}$

-In Data Set 14-4, the short-cut method can be used on

A) W
B) X
C) Y
D) all of the other alternatives are correct.