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    Glossary
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imputation

Definitions:

  A procedure for entering a value for a specific data item where the response is missing or unusable.
Sources:
NIST SP 800-188 from OECD Glossary of Statistical Terms

  The replacement of unknown, unmeasured, or missing data with a particular value. The simplest form of imputation is to replace all missing values with the average of that variable.
Sources:
NIST SP 800-55v1 from NIST Handbook 151 - adapted