Zeroing data points can bias statistics?











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I work with neuroimaging (fMRI in specific). Sometimes we need to zero large regions for lack of data. Would this affect statistics in some way? Would it be better to set those variables to = null or even NaN?



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    up vote
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    down vote

    favorite












    I work with neuroimaging (fMRI in specific). Sometimes we need to zero large regions for lack of data. Would this affect statistics in some way? Would it be better to set those variables to = null or even NaN?



    Thank you










    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I work with neuroimaging (fMRI in specific). Sometimes we need to zero large regions for lack of data. Would this affect statistics in some way? Would it be better to set those variables to = null or even NaN?



      Thank you










      share|improve this question













      I work with neuroimaging (fMRI in specific). Sometimes we need to zero large regions for lack of data. Would this affect statistics in some way? Would it be better to set those variables to = null or even NaN?



      Thank you







      statistics






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      share|improve this question











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      share|improve this question










      asked Nov 20 at 6:04









      Emmanuel Goldstein

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