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ST_strayarea

Determines the range of dispersion of the values.

Calling Sequence

strayval = ST_strayarea(v, p)

Parameters

v:

vector of numerical values

p:

statistical confidence level (%) as a string or the level of significance (alpha) as a decimal value, "95%", "99%", "99.9%" or 0.05, 0.01, 0.001 resp (see examples).

strayval:

stray area, range of dispersion of the values.

Description

"ST_strayarea" determines the range of dispersion of the values. It describes the quality of the raw values.

\begin{eqnarray}
T = s \cdot t
\end{eqnarray}

T: stray area of values; s: sample standard deviation; t: student factor (dependent on statistical confidence level P% and degree of freedom f=n-1 with n: number of values)

E.g. if strayval = 1.4 at p = 95% with a mean = 10,0 all raw values of the whole population will be expected with a confidence of 95% at about 10.0 +/- 1.4.

Examples

v = [6 8 14 12 5 15];
mean(v) // = 10.
ST_strayarea(v, "95%") // = 10.904
ST_strayarea(v, 0.05)  // = 10.904

See also

Authors

Bibliography

R. Kaiser, G. Gottschalk; "Elementare Tests zur Beurteilung von Meßdaten", BI Hochschultaschenbücher, Bd. 774, Mannheim 1972.


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