
66 Six Sigma Case Studies with Minitab
®
FIGURE 5.7
Creation of contingency table for chi-square analysis.
Tabulated statistics: Importance of Candy Color, City
Using frequencies in Observed
Rows: Importance of Candy Color Columns: City
New York San
Boston Chicago Cleveland City Francisco All
1 92 29 38 53 62 274
2 63 58 46 36 70 273
3 98 100 82 41 125 446
4 480 478 326 263 486 2033
5 315 250 364 196 348 1473
6 257 203 405 304 252 1421
7 197 197 274 642 210 1520
All 1502 1315 1535 1535 1553 7440
Cell Contents: Count
FIGURE 5.8
Observed data.