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Grouped data analysis

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  • #33336

    Isabel
    Participant

    I do have a data set in the following format:
    Lead Time Days Number of Orders
    10 1000
    11 30
    15 1500
    I am trying to determine the distribution for the Lead Time
    for the Orders,Does Minitab has the capability of doing the analysis in this
    format?I would appreciate any suggestion.Thanks.Isabel

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    #90127

    Trev
    Member

    Yes, they do. Call their support line — they’re terrific.

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    #90141

    Eileen
    Participant

    Isabel,
    Don’t worry about Minitab at this point. You only have 6 data points. Too few to tell anything about a distribution. In addition, you have some real extreme points. What is going on with the 1000 and 1500 values? Are these from the same population or are there special causes in your data?
    Generally, lead time is a lognormal distribution. But, you have far too few values to attempt any type of distribution fit. Any number of distribution could be fitted to you data set.
    Eileen
     

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    #90216

    Sasha
    Member

    Isabel,There is a Minitab Macro, that performs the frequency
    expansion you are looking for. Visit the Minitab Web
    Page, on the Learning tab enter 334, which the Expand
    macro, download it. You may call technical support for
    assistance, they are great.
    I hope this helps.
    Sasha

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