xInv : *xInv :

7-11-19

Distributions

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 .

SProgram, eActivity or Main Application

Command: PoissonCD :

Command Syntax

Lower value, Upper value, Λ value

Input Example:

PoissonCD 2,3,2.26

Graphing may take a long time when the absolute value of the argument is large.

Inverse Poisson Cumulative Distribution

Menu: [Inv. Distribution]-[Inverse Poisson CD]

Description: This command calculates the inverse of the Poisson cumulative distribution.

m



x = 0

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)

Λ: mean (Λ > 0)

Calculation Result Output

inverse Poisson cumulative distribution

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.

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