Six Sigma Case Studies with Minitab®

267Chi-Square Test to Verify Source Association

Figure15.14. Click on “Other Stats” and it opens the dialog box shown in

Figure15.16. Check the box for “Fisher’s exact test for 2x2 tables” and click

on “OK”. It takes you back to the dialog box shown in Figure15.14. Click on

“OK” and the output shown in Figure15.17 is the result. Because the P-values

of the Pearson chi-square and Fisher’s exact test are <0.05, reject the null

hypothesis. In other words, there is a signicant association between prod-

uct conformance and facility.

The following shows how Minitab

®

calculates the Pearson chi-square

value of 4.466 shown in Figure15.17. Table