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20090601
C
2
Cumulative Distribution
Menu: [Distribution]-[
C
2
CD ]
Description: This command calculates the probability of
C
2
distribution data falling between
a
and
b
.
p =
1
2
df
df
2
x e dx
2
1
df
2
–1
x
2
–
a
b
a
: lower bound (Lower)
b
: upper bound (Upper)
Definition of Terms
Lower : lower bound
Upper : upper bound
df
: degrees of freedom (positive integer)
Calculation Result Output
prob
:
C
2
distribution probability
p
Example
Lower bound : 2.7 (upper bound :
d
)
Degrees of freedom : 4
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Distribution].
(2) Select [
C
2
CD] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
(5) To display the graph, tap
.
S
Program, eActivity or Main Application
Command: ChiCD
:
Command Syntax
Lower value, Upper value,
df
value
Input Example:
ChiCD 2.7,
d
,4
Inverse
C
2
Cumulative Distribution
Menu: [Inv. Distribution]-[Inverse
C
2
CD]
Description: This command calculates the inverse of the
C
2
cumulative distribution.
This command returns the lower bound of integration value
α
that satisfies the
equation above.
7-11-10
Distributions