C2cdf, Fpdf – Texas Instruments TI-84 User Manual
Page 381
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Chapter 13: Inferential Statistics and Distributions
378
c
2
cdf(
cdf(
cdf(
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)
Fpdf(
Fpdf(
Fpdf(
Fpdf(
Ü
pdf(
computes the probability density function (
) 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 (
) is:
where
n
= numerator degrees of freedom
d
= denominator degrees of freedom
f x
( )
Γ n d
+
(
)/2
[
]
Γ n/2
(
)Γ d/2
(
)
----------------------------------
n
d
---
⎝ ⎠
⎛ ⎞
n/2
x
n/2
1
–
1
nx/d
+
(
)
n
d
+
(
)/2
–
x
0
≥
,
=
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