The probability of covering the expected value of an estimated parameter with an interval estimated for the parameter (symbol
). The confidence level can be expressed as a number between 0 and 1, or in percent. The complementary quantity is known as the significance level.

Note:

In some cases the confidence level is dictated by the needs of the situation. In all
other instances, use of
is recommended.

Source:

PAC, 1994, *66*, 595*
(Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations
1994))
* on page 599