User Manual

TI-83 Plus Inferential Statistics and Distributions 429
c
2
cdf(
c
2
cdf(
computes the
c
2
(chi-square) distribution probability between
lowerbound
and
upperbound
for the specified
df
(degrees of freedom), which
must be an integer > 0.
c
2
cdf(
lowerbound
,
upperbound
,
df
)
Ü
pdf(
Ü
pdf(
computes the probability density function (pdf) for the
Û
distribution
at a specified
x
value.
numerator df
(degrees of freedom) and
denominator df
must be integers > 0. To plot the
Û
distribution, paste
Ü
pdf(
to the
Y=
editor. The probability density function (pdf) is:
0,)/1(
)2/()2/(
]2/)[(
)(
2/)(12/
2/
≥+






ΓΓ
+Γ
=
+−−
xdnxx
d
n
dn
dn
xf
dnn
n
where
n
= numerator degrees of freedom
d
= denominator degrees of freedom