Definitions Edit

General Edit

Precision is

the specificity (or exactness) of a value; typically, the number of decimal points used to express the fractional part of a number.[1]

Information retrieval Edit

Precision is

a measure of the effectiveness of information retrieval and is often expressed as the ratio of relevant documents to the total number of documents retrieved in response to a specific search. For example, using a Web search engine, if a search retrieves 100 documents, but only 30 of them are truly relevant to the search, the precision would be 30 percent.[2]

Overview Edit

As opposed to accuracy, precision does not indicate how close a measurement is to a true value.

References Edit

  1. Georeferencing: The Geographic Associations of Information, Glossary, at 232.
  2. Youth, Pornography, and the Internet, Glossary, at 414.

See also Edit