Tasty Pizza Ltd desires to know if the size of the pizzas order by their customers depends on the toppings chosen. Data was gathered for the last 300 customers and the results obtained using MINITAB are shown below:
Exhibit 3
Expected counts are printed below observed counts
Small
Medium
Large
All
Cheese
23
32
34
26.403
31.743
30.853
89
Tuna
35
36
31.150
**
36.400
105
Pepperoni
40
31.447
37.807
36.747
*
107
104
300
Chi-sq =
0.43868 +
*** +
0.320922 +
0.260754+
0.16028 +
0.004396 +
0.009736 +
0.12725 +
0.205302 =
1.5293
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