7-11-19

Distributions

uProgram, 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.

m

Σ

x = 0

Minimum value of the upper bound of summation which satisfies the inequality m =? (integer, m >0)

Definition of Terms

prob :� �������Poisson ����������cumulative �����������probability ��(0 <prob <1)

μ:� mean���� (�μ > 0)

Calculation Result Output

xInv : inverse Poisson cumulative distribution

*xInv : 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 >>].

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