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Multivariate statistics
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===Dealing with incomplete data=== It is very common that in an experimentally acquired set of data the values of some components of a given data point are [[Missing data|missing]]. Rather than discarding the whole data point, it is common to "fill in" values for the missing components, a process called "[[imputation (statistics)|imputation]]".<ref>{{cite book |title=Analysis of Incomplete Multivariate Data |author=J.L. Schafer |publisher=Chapman & Hall/CRC |year=1997 |isbn=978-1-4398-2186-2}}</ref>
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