Difference between revisions of "TI-BASIC:Chisquarepdf"

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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 =

Latest revision as of 19:23, 24 February 2016

CHISQUAREPDF.GIF

Command Summary

Evaluates the χ² probability density function at a point.

Command Syntax

χ²pdf(x, df

Menu Location

Press:

  1. 2ND DISTR to access the distribution menu
  2. 6 to select χ²pdf(, or use arrows.

Press 7 instead of 6 on a TI-84+/SE with OS 2.30 or higher.

Calculator Compatibility

TI-83/84/+/SE

Token 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

<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} </math>

Related Commands