Difference between revisions of "User:Regina"
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<tt>'''CHISQDIST(x; k; FALSE())'''</tt> returns the probability density function for the χ<sup>2</sup>-distribution: | <tt>'''CHISQDIST(x; k; FALSE())'''</tt> returns the probability density function for the χ<sup>2</sup>-distribution: | ||
| − | :<math> 0 \ | + | :<math> 0 \quad \textrm{for}\; x < 0 </math> |
| − | + | and | |
| − | :<math> \frac {x^{\frac k 2 -1}\,e^{- \frac x 2}} {2^{\frac k 2}\,\Gamma(\frac k 2) } \ | + | :<math> \frac {x^{\frac k 2 -1}\,\mathrm e^{- \frac x 2}} {2^{\frac k 2}\,\Gamma(\frac k 2) } \quad \textrm{for}\; x \ge 0 </math> |
<tt>'''CHISQDIST(x; df; TRUE())'''</tt> returns the left tail probability for the χ<sup>2</sup>-distribution: | <tt>'''CHISQDIST(x; df; TRUE())'''</tt> returns the left tail probability for the χ<sup>2</sup>-distribution: | ||
| − | :<math>0 | + | :<math>0\quad \textrm{for}\; x<0</math> |
and | and | ||
| − | :<math> \int_x^{\infty} \frac {t^{\frac k 2 -1}\,e^{- \frac t 2}} {2^{\frac k 2}\,\Gamma(\frac k 2) }\, | + | :<math> \int_x^{\infty} \frac {t^{\frac k 2 -1}\,\mathrm e^{- \frac t 2}} {2^{\frac k 2}\,\Gamma(\frac k 2) }\,\mathrm d t \quad \textrm{for}\; x \ge 0</math> |
=== Example === | === Example === | ||
Revision as of 15:39, 27 September 2008
- native language
- German
- active in project
- de, qa. sc
- OOo user name
- regina
- special interest
- www.ooowiki.de
Sandbox
CHISQDIST
Calculates values for a χ2-distribution.
Syntax
CHISQDIST(x; k; Cumulative)
- x is a number.
- k is the (positive integer) degrees of freedom for the χ2-distribution.
- Cumulative is a logical value. In the case Cumulative=TRUE() the cumulative distribution function is used, in the case Cumulative=FALSE() the probability density function. This parameter is optional. It is set to TRUE() if missing.
Formulas
CHISQDIST(x; k; FALSE()) returns the probability density function for the χ2-distribution:
and
CHISQDIST(x; df; TRUE()) returns the left tail probability for the χ2-distribution:
and
Example
CHSQDIST(2.7; 3;FALSE())
- returns approximately 0.1699395239
CHSQDIST(2.7; 3;TRUE())
- returns approximately 0.5597727056
.
See also:
CHISQINV, LEGACY.CHIDIST, LEGACY.CHIINV, CHITEST
Functions listed alphabetically, Functions listed by category
Issues:
This function is expected for OOo3.1
