User Manual

TI-83 Plus Inferential Statistics and Distributions 428
tcdf(
lowerbound
,
upperbound
,
df
)
c
2
pdf(
c
2
pdf(
computes the probability density function (pdf) for the
c
2
(chi-square) distribution at a specified
x
value.
df
(degrees of freedom)
must be an integer > 0. To plot the
c
2
distribution, paste
c
2
pdf(
to the
Y=
editor. The probability density function (pdf) is:
0,2)/(1
)2/(
1
)(
2/12/2/
≥
Γ
=
−−
xex
df
xf
xdfdf
c
2
pdf(
x
,
df
)
Note: For this example,
Xmin = 0
Xmax = 30
Ymin =
L
.02
Ymax = .132