Chapter 13: Inferential Statistics and Distributions 377
c2pdf(
pdf(pdf(
pdf(
c2pdf( computes the probability density function (pdf) for the c2 (chi-square) distribution
at a specified x value. df (degrees of freedom) must be an integer >0. To plot the c2
distribution, paste c2pdf( to the Y= editor. The probability density function (pdf) is:
c2pdf(x,df)
Note: For this example,
Xmin = 0
Xmax = 30
Ymin = L.02
Ymax = .132
fx() 1
Γdf 2⁄()
-------------------- 1/2()
df/2xdf 21–⁄ex/2–x0≥,=