Kchi-square distribution – Casio fx-9750G PLUS User Manual
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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
u
u
u
u
u
χ
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