(Step-by-Step) The average length of a small counterweight bar is 43 millimeters. The Production supervisor is concerned that the settings have changed in
Question:
The average length of a small counterweight bar is 43 millimeters. The Production supervisor is concerned that the settings have changed in the counterweight production machine. Request an investigation to the engineering department, to selects A random sample of 12 bars and measures them. The results are summarized below In millimeters.
42 39 42 45 43 40 39 41 40 42 43 42
Is it reasonable to conclude that the average length of the bars changed? Use the Significance level of .02?
Deliverable: Word Document 
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