pchisqGC: Graphical Calculator for Chi-Square Probabilities
In homerhanumat/tigerstats: R Functions for Elementary Statistics

pchisqGC

R Documentation

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 hwhite0@georgetowncollege.edu

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")

homerhanumat/tigerstats documentation built on June 13, 2025, 8:34 a.m.