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Standard deviation using IF and OR function for multiple conditions

  1. #1
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    Standard deviation using IF and OR function for multiple conditions

    Dear ex(cel)perts,

    I have run into a problem analyzing some data from a questionnaire.

    I would like to calculate the standard deviation for one variable - their weight, but they have to meet either of two conditions.
    Or said in another way: In the questionnaire they have 3 options, but I only want to calculate the standard deviation of their weight if they have chosen option 1 or option 2, not option 3.

    I have tried using the following formulas, but they did not work (even with ctrl+alt+enter):
    =STDEV.P(IF(OR(Question Datarange="Option1",Question Datarange="Option2"),Weight Datarange))
    =STDEV.P(IF(Question Datarange="Option1",Weight Datarange),IF(Question Datarange="Option2",Weight Datarange))

    Anyone who can help me out here?

    Best Regards
    Knut

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    Re: Standard deviation using IF and OR function for multiple conditions

    =STDEV.P(IF(A2:A10="option1",C2:C10,IF(A2:A10="option2",C2:C10,""))) as an array. Hopefully you can change the ranges for your data. a2:a10=question data range

    I think =STDEV.P(IF(A2:A10="option1",C2:C10,IF(A2:A10="option2",C2:C10))) will also work, but prefer to get rid of the FALSE values in the array

    a2:a10 = question daterange
    c2:c10 = weight daterange


    or =STDEV.P(IF(A2:A10<>A10,"option 3" C2:C10,""))


    All entered as an array
    Last edited by davsth; 11-23-2020 at 07:11 AM.

  3. #3
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    Re: Standard deviation using IF and OR function for multiple conditions

    Wow, quick response and it worked! Thank you very much.

    I am very grateful!

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