pchisqGC {tigerstats}

Graphical Calculator for Chi-Square Probabilities

Description

Shades desired areas under a specified chi-square curve, returns numerical value of the area.

Usage

pchisqGC(bound,region="above",df=NA,xlab="chi_square_statistic",graph=FALSE)

Arguments

bound

A numerical vector of length 1, indicating boundary of shaded region on horizontal axis

region

A character string. Possible values are "below" and "above"

df

Degrees of freedom of the chi-square distribution

xlab

Label for the horizontal axis

graph

produce graph?

Value

Numerical value of area under curve over region. Also plots the chi-square curve with the shaded area.

Author(s)

Homer White [e-mail]

Examples

#This gives P(X < 6.8) where X is chisq with 3 degrees of freedom:
pchisqGC(6.8,df=3,region="below")

#This gives P(X >= 6.8), where X is chisq with 3 degrees of freedom
pchisqGC(6.8,df=3,region="above")