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How are missing values for attributes handled with respect to class statistics like average or standard deviation?

April 26, 2017average class deviation handled MISSING respect standard statistics values

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How are missing values for attributes handled with respect to class statistics like average or standard deviation?

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Missing values are ignored with respect to calculating class statistics. If you have many missing values for an attribute, you may wish to display the %Val for the attribute. This will show the percentage of compounds with a value for the particular attribute.