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20090601
7-11-5
Distributions
S
Program, eActivity or Main Application
Command: NormCD
:
Command Syntax
Lower value, Upper value,
σ
value,
μ
value
Input Example:
NormCD −
d
,36,2,35
Inverse Normal Cumulative Distribution
Menu: [Inv. Distribution]-[Inverse Normal CD]
Description: This command calculates the cumulative probability in a normal distribution
based on lower and upper bounds.
This command returns the upper and lower bound of integration values that
satisfy the equations below.
Tail:Left Tail:Right Tail:Center
Upper bound α is
returned.
Lower bound α is
returned.
Lower bound α and upper
bound β are returned.
2
α+β
μ
Definition of Terms
Tail setting: probability value tail specification (L (Left), R (Right), C (Center))
Area : probability value (0
Area
1)
σ
: population standard deviation (
σ
> 0)
μ
: population mean
Calculation Result Output
inverse cumulative normal distribution
x
1
InvN: Upper bound when Tail:Left
Lower bound when Tail:Right or Tail:Center
x
2
InvN: Upper bound when Tail:Center
Example
Tail : Left
Probability : 0.7
Population standard deviation : 2
Population mean : 35
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Distribution].
(2) Select [Inverse Normal CD] and then tap [Next >>].
(3) Select Tail setting [Left] and input values.
(4) Tap [Next >>].
(5) To display the graph, tap
.