KermMartian at 19:23, 24 February 2016

2016-02-24T19:23:43Z

← Older revision		Revision as of 19:23, 24 February 2016
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	The value of χ²pdf( is given by		The value of χ²pdf( is given by

	~~[[TI-BASIC:Math\|Math]]~~		<math>
	\definecolor{darkgreen}{rgb}{0.90,0.91,0.859}\pagecolor{darkgreen}		\definecolor{darkgreen}{rgb}{0.90,0.91,0.859}\pagecolor{darkgreen}
	\operatorname{\chi^2pdf}(x,k)=\frac{(1/2)^{k/2}}{(k/2-1)!}\,x^{k/2-1}e^{-x/2}		\operatorname{\chi^2pdf}(x,k)=\frac{(1/2)^{k/2}}{(k/2-1)!}\,x^{k/2-1}e^{-x/2}
	~~[[TI-BASIC:~~/math~~\|/math]]~~		</math>

	= Related Commands =		= Related Commands =

Maintenance script: Initial automated import

2016-02-24T18:33:01Z

Initial automated import

New page

{{Template:TI-BASIC:Command
|picture=CHISQUAREPDF.GIF
|summary=Evaluates the χ² probability density function at a point.
|syntax=χ²pdf(''x'', ''df''
|location=Press:
# 2ND DISTR to access the distribution menu
# 6 to select χ²pdf(, or use arrows.
Press 7 instead of 6 on a TI-84+/SE with OS 2.30 or higher.
|compatibility=TI-83/84/+/SE
|size=2 bytes
}}

χ²pdf( is the χ² probability density function.

Since the χ² distribution is continuous, the value of χ²pdf( doesn't represent an actual probability -- in fact, one of the only uses for this command is to draw a graph of the χ² curve. You could also use it for various calculus purposes, such as finding inflection points.

The command takes two arguments: the value at which to evaluate the p.d.f., and ''df'', the number of 'degrees of freedom'.

= Formulas =

The value of χ²pdf( is given by

[[TI-BASIC:Math|Math]]
\definecolor{darkgreen}{rgb}{0.90,0.91,0.859}\pagecolor{darkgreen}
\operatorname{\chi^2pdf}(x,k)=\frac{(1/2)^{k/2}}{(k/2-1)!}\,x^{k/2-1}e^{-x/2}
[[TI-BASIC:/math|/math]]

= Related Commands =

* [[TI-BASIC:Chisquarecdf|χ²cdf(]]
* [[TI-BASIC:Shadechisquare|Shadeχ²(]][[Category:TI-BASIC]]
[[Category:TIBD]]

TI-BASIC:Chisquarepdf - Revision history

KermMartian at 19:23, 24 February 2016

Maintenance script: Initial automated import