easy · GMAT Verbal
A factory added short rest breaks and defect rates declined. The manager concludes the breaks reduced defects.
The answer to which question would be most useful for evaluating the conclusion?
- How long has the organization operated?
- Who formally approved the change?
- Was the change announced in writing?
- What was the factory’s total annual revenue before and after the rest-break policy began?
- Was production equipment replaced when the break policy began?
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