A total of n = 309 furniture defects were recorded and the defects were classified into four types: A, B, C, or D. At the same time, each piece of furniture was identified by the production shift in which it was manufactured. These counts are presented in a contingency table in Table 14.3.

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Contingency Table Shift Type of Defects 1 2 3 Total A 15 26 33 B 21 31 17 C 45 34 49 D 13 5 20 2148 74 69 128 38 Total 94 96 119 309