x / x bar

X (x bar) - The algebraic symbol representing the mean, or average, of a set of values.

[Category=Data Quality ]

Source: Larry English, http://www.iaidq.com/main/glossary.shtml , 16-Feb-2009 10:10

x - The algebraic symbol representing a set of values. 

[Category=Data Quality ]

Source: Larry English, http://www.iaidq.com/main/glossary.shtml , 16-Feb-2009 10:10

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X - Xs are the independent inputs to a process that cause or control a problem to occur in the output (Y) of a process. Once quantified through Design of Experiment, a transfer function Y=f(X) can be developed to define the relationship of elements and help control a process.

[Category=Data Quality ]

X Bar - Also known as the sample mean. See Mean.

[Category=Data Quality ]

Source: iSixSigma, 05 March 2011 09:56:44, https:web.archive.org/web/20111109014246/http:www.isixsigma.com/index.php?option=com_glossary