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Sample Size using Minitab

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  • #33556

    jediblackbelt
    Participant

    I have a situation where my current scrap rate is 10% and I think my new process should have no scrap.  I want my power to be .9.  How do I put it into Minitab?  Am I fooling myself to think that the new process is mistake proofed to not make defects?  Is that why I can not put a zero in for a proportion in minitab?  Just confused.  I want to be able to take a sample of the new process and make sure the proportion of defects I have now is where I need to be.  Help!

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    #90941

    faceman
    Participant

    JediBB,
    You got it.  Just put in some very small value for proportion 2.  It should work.  Then after you run your trial put in the data and leave the power blank and you will get the power of your test.
     

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