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For the modeling task they retained only records that appeared in all three files (household file, promotion file, transaction file). Why does this have potential
- For the modeling task they retained only records that appeared in all three files (household file, promotion file, transaction file). Why does this have potential to undermine the conclusions of their modeling effort? (Hint: This is a challenging question, and the answer is not in the article. To answer it, think about what you learned in statistics about populations and representative samples.)
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