Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 252

2
c pdf(x,df)
2
cdf(
c
2
computes the c
c cdf(
the specified (degrees of freedom), which must be an integer > 0.
df
2
cdf(lowerbound,upperbound,df)
c
Fpdf(
Ü
computes the probability density function (
pdf(
(degrees of freedom) and
numerator df
paste Ü
to the Y= editor. The probability density function (
pdf(
Γ n [ ( )/2 ]
+ d n
⎛ ⎞
f x ( )
--------------------------------- - -- -
=
⎝ ⎠
Γ n/2 ( )Γ d/2 ( )
d
where = numerator degrees of freedom
n
= denominator degrees of freedom
d
Note: For this example,
Xmin = 0
Xmax = 30
Ymin = L .02
Ymax = .132
2
(chi-square) distribution probability between
denominator df
n/2
n/2 1 – –
( )
x 1 + nx/d
Chapter 13: Inferential Statistics and Distributions
) for the Ü distribution at a specified
pdf
must be integers > 0. To plot the Ü distribution,
) is:
pdf
( )/2
n + d
≥
, x 0
and
lowerbound upperbound
value.
x
for
245