Casio fx-9750G PLUS - Manual (Page 338)

310
k k k k 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
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