2. Table below gives the number of articles produced by four different operators working on two different types of machines, I and II, on different days of the week. Determine at the 0.05 level...

Extracted text: 2. Table below gives the number of articles produced by four different operators working on two different types of machines, I and II, on different days of the week. Determine at the 0.05 level whether there are significant differences (a) between the operators and (b) between the machines. To answer this question, you can use simple Excel functions. Machine I Machine II Mon Tue Wed Thu Mon Wed Thu Fri Fri Tue Operator A 15 18 17 20 12 14 16 18 17 15 Operator B 12 16 14 18 11 11 15 12 16 12 Operator C 14 17 18 16 13 12 14 16 14 11 Operator D 19 16 21 23 18 17 15 18 20 17