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310
kk
kk
k Chi-square Distribution
You can use the following menu to select from the different types of chi-square
distribution.
•{Cpd}/{Ccd} ... {χ
2
probability density}/{χ
2
distribution probability} calculation
uu
uu
uχ
2
probability density
χ
2
probability density calculates the probability density function for the χ
2
distribution at a specified x value.
f
(x) =
Γ
1
2
df
df
2
x e
2
1
df
2
–1
x
2
–
(x > 0)
Perform the following key operations from the statistical data list.
5(DIST)
3(CHI)
1(Cpd)
Data is specified using parameter specification. The following shows the meaning
of each item.
x ..................... data
df .................... degrees of freedom (positive integer)
Execute .......... executes a calculation or draws a graph
Example To calculate χ
2
probability density for a specific parameter
value
For this example, we will calculate χ
2
probability density when
x = 1 and degrees of freedom = 3.
bw
dw
1(CALC)
p(x) ................. χ
2
probability density
18 - 8 Distribution
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