Question: Because of high production changeover time and costs, a direction of manufacturing must convince management that a proposed manufacturing method reduces costs before the new method can be implemented. The current production method operates with a mean cost of $220 per hour. A research study will measure the cost of the new method over a sample production period.

1. Develop the null and alternative hypothesis most appropriate for this study.
2. Comment on the conclusion when H _o cannot be rejected.
3. Comment on the conclusion when H _o can be rejected.

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