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Issue with IASSC Black Belt Evaluation Exam Question

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  • #252332

    Rachid Bekani
    Participant

    I purchased the IASSC Black Belt Evaluation Exam one question in the set said :

    From this control chart with a center line indicated by line number 4, which of the following observation numbers is more than 2 sigma from the mean?

    the proposed  answers are :

    A) 5
    B)9
    C) 13
    D) 15
    E)17
    F)23

    trying to synthesize the elements to answer the questions, it seems to me that something is missing.
    Finally I sent an email to IASS They answered me that the question is fair and complete.
    Now I find the basis for answering the question.
    Any ideas?
    thank you

    0
    #252456

    Bob Rome
    Participant

    Are the control limits shown on the chart?

    0
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