November 2017
Beginner
286 pages
8h 13m
English
book
Statistics for Data Science
by James C. Mott, Rajprasath Subramanian, Shaikh Salamatullah, James D. Miller, Vijayakumar Ramdoss
Content preview from Statistics for Data Science
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Domain expertise
Moving on, another data cleaning technique is referred to as cleaning data based upon domain expertise. This doesn't need to be complicated. The point of this technique is simply using information not found in the data. For example, previously we excluded cases with negative Coin-in values since we know it is impossible to have a negative Coin-in amount. Another example might be the time when Hurricane Sandy hit the northeast United States. During that period of time, the cases of most machines had very low (if not zero) Coin-in amounts. A data scientist would probably remove all the data cases during a specific time period, based on that information.
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