Casio ClassPad 330 - Page 465

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u
Program, eActivity or Main Application
Command: PoissonCD

Command Syntax
x
value,
μ
value
Input Example:
PoissonCD 3,2.26
Inverse Poisson Cumulative Distribution
Menu: [Distribution]-[Inverse Poisson CD]
Description: This command calculates the inverse of the Poisson cumulative distribution.
Minimum value of the upper bound of summation which satisfies the inequality
m
=? (integer,
m
>
0)
Definition of Terms
prob
: Poisson cumulative probability (0 Poisson cumulative probability (0
<
prob
<
1)
μ
: mean ( mean (
μ
> 0)
Calculation Result Output
x
Inv : inverse Poisson cumulative distribution
*
x
Inv : recalculation value (Displayed only when there may be a possiblility of
rounding error.)
• To account for possible rounding error, ClassPad additionally obtains the
result using the probability that is next lowest for the least significant digit.
For example, if the probability is 0.99999, ClassPad would recalculate using
0.99998. The recalculation result is only shown if it is different from the original
one.
Example
Poisson cumulative probability : 0.8074
Mean : 2.26
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Distribution].
(2) Select [Inverse Poisson CD] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
Σ
= 0
x
m
Σ
= 0
x
m
7-11-19
Distributions
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