Operation Manual

Chapter 13: Inferential Statistics and Distributions 250
Fpdf(
Üpdf( computes the probability density function (pdf) for the Ü distribution at a specified x value.
numerator df (degrees of freedom) and denominator df must be integers > 0. To plot the Ü distribution,
paste Ü
pdf( to the Y= editor. The probability density function (pdf) is:
Üpdf(x,numerator df,denominator df)
Fcdf(
Ücdf( computes the Ü distribution probability between lowerbound and upperbound for the specified
numerator df (degrees of freedom) and denominator df. numerator df and denominator df must be integers
>0.
Ü
cdf(lowerbound,upperbound,numerator df,denominator df)
binompdf
binompdf( computes a probability at x for the discrete binomial distribution with the specified
numtrials and probability of success (p) on each trial. x can be an integer or a list of integers. 0p1 must
be true.
numtrials must be an integer > 0. If you do not specify x, a list of probabilities from 0 to
numtrials is returned. The probability density function (pdf) is:
where
n = numtrials
where
n = numerator degrees of freedom
d = denominator degrees of freedom
Note: For this example,
Xmin = 0
Xmax = 5
Ymin = 0
Ymax = 1
fx
 nd+/2
 n/2d/2
----------------------------------
n
d
---


n/2
x
n/2 1–
1 nx/d+
nd+/2–
x 0,=
fx
n
x


p
x
1 p–
nx–
x, 0,1,...,n==