| Artifact (observational) |
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For example, a '' Compression Artifact '' in Computer Science is a noticeable error caused by Lossy Data Compression . In Microscopy , artifacts are sometimes introduced during the processing of samples into Slide form. In Econometrics , which trades on computing linear relationships between related Variables , an artifact is a spurious finding, such as one based on either a faulty choice of variables or an overextension of the computed relationship. Such an artifact may be called a statistical artifact. For instance, a hypothetical finding that presidential Approval Rating is approximately equal to twice the percentage of citizens making more than $50,000 annually would predict that the approval rating will be 120% if 60% of citizens make over $50,000. This prediction is a statistical artifact, since it is spurious to use the Model when the percentage of citizens making over $50,000 is so high (and silly to predict an approval rating greater than 100%). SEE ALSO |