October 2016
Beginner
378 pages
8h 21m
English
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The detection and treatment of outliers
In data science, examples are at the core of learning from data processes. If unusual, inconsistent, or erroneous data is fed into the learning process, the resulting model may be unable to correctly generalize the accommodating of any new data. An unusually high value present in a variable, apart from skewing descriptive measures such as the mean and variance, may also distort how many machine learning algorithms learn from data, causing distorted predictions as a result.
When a data point deviates markedly from the others in a sample, it is called an outlier. Any other expected observation is labeled an inlier.
A data point may be an outlier due to the following three general causes (and each one implies ...
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