User Manual

20090601
Example
Lower bound : 2
Upper bound : 3
Mean : 2.26
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Distribution].
(2) Select [Poisson CD] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
(5) To display the graph, tap

.
S
Program, eActivity or Main Application
Command: PoissonCD
:
Command Syntax
Lower value, Upper value,
L
value
Input Example:
PoissonCD 2,3,2.26
Inverse Poisson Cumulative Distribution
Menu: [Inv. Distribution]-[Inverse Poisson CD]
Description: This command calculates the inverse of the Poisson cumulative distribution.
This command returns the minimum value (positive integer) of
m
(
3
upper
bound) that satisfies the inequality formula above.
Definition of Terms
prob
: Poisson cumulative probability (0

prob

1)
L
: mean (
L
> 0)
Calculation Result Output
x
Inv : inverse Poisson cumulative distribution
*
x
Inv : recalculation value (Displayed only when there may be a possibility 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.
Graphing may take a long
time when the absolute value
of the argument is large.
Graphing may take a long
time when the absolute value
of the argument is large.

= 0
x
m

= 0
x
m
7-11-19
Distributions