Shown Below Is a 2 × 3 Contingency Table with Observed

Essay

Shown below is a 2 × 3 contingency table with observed values from a random sample of size 500. At 95% confidence, test for independence of the row and column factors. $$\begin{array} { c | c c c } & { \text { Column Factor } } \\\text { Row Factor } & x & y & z \\\hline \text { A } & 40 & 50 & 110 \\\text { B } & 60 & 100 & 140\end{array}$$