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ST_studentfactor

Determine the student factor

Calling Sequence

retval = studentfactor(n, p)

Parameters

n:

number of values in the sample distribution

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).

retval:

student factor

Description

Determine the student factor from the internal t-table and interpolate the value if necessary. It is a service function for ST_strayarea() and ST_trustarea().

Examples

retval = ST_studentfactor(35, "95%") // = 2.0324
retval = ST_studentfactor(35, 0.05)  // = 2.0324

See also

Authors

Bibliography

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


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