Chi ^2 pdf – Texas Instruments TI-83 PLUS User Manual
Page 431
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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
/
1
2
/
2
/
≥
Γ
=
−
−
x
e
x
df
x
f
x
df
df
c
2
pdf(
x
,
df
)
Note: For this example,
Xmin = 0
Xmax = 30
Ymin =
L
.02
Ymax = .132
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