. A total of 309 furniture defects were recorded and the defects were classified into four types, A, B, C and D. At the same time, each piece of furniture was identified by the production shift it was...

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Extracted text: . A total of 309 furniture defects were recorded and the defects were classified into four types, A, B, C and D. At the same time, each piece of furniture was identified by the production shift it was manufactured. These counts are presented in the table below. Do the data present sufficient evidence to indicate that the type of furniture defect varies with the shift during which the piece of furniture is produced? Shift 1 2 3 Type of defects A 15 26 33 21 31 17 45 34 49 13 5 20