Because of high production-changeover time and costs, a director 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 $205 per hour. A research study will measure the cost of the new method over a sample production period. a. Develop the null and alternative hypotheses most appropriate for this study. Ho: A - Select your answer - v 205 Ha: A - Select your answer - 205 b. Comment on the conclusion when #o cannot be rejected. We - Select your answer - | conclude that the new method reduces costs. c. Comment on the conclusion when Ho can be rejected. Consider implementing the new method based on the conclusion that it - Select your answer - v| the mean cost per hour