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Exit VCEDump A00-240 SAS Statistical Business Analysis Using SAS 9: Regression and Modeling

Q14 Single choice

What is a drawback to performing data cleansing (imputation, transformations, etc.
) on raw data prior to partitioning the data for honest assessment as opposed to performing the data cleansing after partitioning the data?

A
It violates assumptions of the model.
B
It requires extra computational effort and time.
C
It omits the training (and test) data sets from the benefits of the cleansing methods.
D
There is no ability to compare the effectiveness of different cleansing methods.

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