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The following are number of mistakes made on five occasions by word processor operators setting a...
The following are number of mistakes made on five occasions by word processor operators setting a technical report.
Operator 1: 10 13 9 11 12
Operator 2: 11 13 8 16 12
Operator 3: 10 15 13 11 15
Operator 4: 15 7 11 12 9
Perform an analysis of variance and decide at the 0.01 level of significance whether the differences among the four sample means can be attributed to chance. State the conclusion.
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