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Using the Action Menu

Example: To determine the minimum number of trials when prob = 0.8074, μ = 2.26

Menu Item: [Action][Distribution][invPoissonCDf]

For more information, see “Inverse Poisson Cumulative Distribution” on page 7-11-19.

ugeoPDf

Function: Returns the probability in a geometric distribution that the success will occur on a specified trial.

Syntax: geoPDf (x, pos [ ) ]

Example: To determine the geometric probability when x = 6, pos = 0.4

Menu Item: [Action][Distribution][geoPDf]

For more information, see “Geometric Distribution Probability” on page 7-11-20.

ugeoCDf

Function: Returns the cumulative probability in a geometric distribution that the success will occur on or before a specified trial.

Syntax: geoCDf (x, pos [ ) ]

Example: To determine the geometric probability when x = 3, pos = 0.5

Menu Item: [Action][Distribution][geoCDf]

For more information, see “Geometric Cumulative Distribution” on page 7-11-21.

uinvGeoCDf

Function: Returns the minimum number of trials of a geometric cumulative probability distribution for specified values.

Syntax: invGeoCDf (prob, pos [ ) ]

Important!

When executing the invGeoCDf function the calculator uses the specified prob value and the value that is one less the prob value minimum number of significant digits (*prob value) to calculate minimum number of trials values. The results are assigned to the system variables xInv (calculation result using prob) and *xInv (calculation result using *prob). The invGeoCDf function always returns the xInv value only. However, when the xInv and *xInv values are different, the warning message shown below appears showing both values.

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