【求助】化学数理统计

应助达人

straggler离散值
outlier离群值

我不知道有什么区别，能解释一下吗？谢谢

Information can be obtained by searching with Google using the keywords “straggler, outlier, statistics, definition”

For example :

http://www.astm.org/SNEWS/ND_2008/datapoints_nd08.html

Outliers are also known by other names: maverick, flier, straggler or aberrant
value. .... part of ASTM Committee E11 on Quality and Statistics. ...

http://www.nordicinnovation.net/nordtestfiler/tec482.pdf

Outlier: A member, of a set of values, which is inconsistent with the other members of

that set. The consistency can be tested using graphical or numerical techniques (see

sections 4.3 and 4.4).

Straggler: Similar to an outlier but with less inconsistency (see section 4.4 for criteria).

http://www.icp-forests.org/DocsQualLab/EvaluationSoilRingTests.pdf

Organisation and evaluation of future ring tests for Soil

Numerical outliers techniques. If test statistic > 1% critical value = outlier.
If test statistic > 5 % critical value = straggler ...

应助达人

Please refer to the following information,

Extreme values,

stragglers and outliers

Extreme values are defined as observations
in a sample, so far separated in value from
the remainder as to suggest that they may
be from a different population, or the
result of an error in measurement (6).

Extreme values can also be subdivided into
stragglers, extreme values detected
between the 95% and 99% confidence
and outliers； extreme values at >
99% confidence level.

应助达人

reference：