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 $220 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 b. comment on the conclusion when the null cannot be rejected c. comment on the conclusion when the null can be rejected

Step-by-step explanation:

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a. There is currently being used as a method that has a known average cost of $220 and the director wants to know if the new manufacturing method will reduce the cost of the manufacturing prosses. Symbolize it is μ<220 and it will be your alternative hypothesis. Remember in the null hypothesis is commonly the "no change" hypothesis which means it always carries the = sign. So for this test, the most appropriate hypothesis are:

H₀: μ ≥ 220

H₁: μ < 220

b. If you do not reject the null hypothesis, then the conclusion would be that on average, the new manufacturing prosses has an equal or greater cost than the old one.

c. If you reject the null hypothesis, the conclusion would be that the true mean of the cost of the new manufacturing prosses is less than $220.

I hope it helps!

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