Casio ClassPad II fx-CP400+E User Manual page 89

u poissonCDf [Action][Distribution/Inv.Dist][Discrete][poissonCDf]
Function: Returns the cumulative probability in a Poisson distribution that the success will occur between
specified lower value and upper value.
Syntax: poissonCDf(lower value, upper value,
Calculation Result Output:
Example: To determine the Poisson cumulative probability when lower
value = 2, upper value = 3,
u invPoissonCDf [Action][Distribution/Inv.Dist][Inverse][invPoissonCDf]
Function: Returns the minimum number of trials of a Poisson cumulative probability distribution for specified
values.
Syntax: invPoissonCDf(
Calculation Result Output:
Important!
See "Important!" under "invBinomialCDf" on page 88.
Example: To determine the minimum number of trials when
= 2.26
u geoPDf [Action][Distribution/Inv.Dist][Discrete][geoPDf]
Function: Returns the probability in a geometric distribution that the success will occur on a specified trial.
x pos
Syntax: geoPDf( ,
Calculation Result Output:
Example: To determine the geometric probability when
u geoCDf [Action][Distribution/Inv.Dist][Discrete][geoCDf]
Function: Returns the cumulative probability in a geometric distribution that the success will occur between
specified lower value and upper value.
Syntax: geoCDf(lower value, upper value,
Calculation Result Output:
Example: To determine the geometric probability when lower value = 2,
upper value = 3,
u invGeoCDf [Action][Distribution/Inv.Dist][Inverse][invGeoCDf]
Function: Returns the minimum number of trials of a geometric cumulative probability distribution for specified
values.
prob
Syntax: invGeoCDf(
Calculation Result Output:
Important!
See "Important!" under "invBinomialCDf" on page 88.
Example: To determine the minimum number of trials when
pos
= 0.5
prob
= 2.26
prob , [ ) ]
Inv, ½
x x
Inv
[ ) ]
prob
pos
prob
pos
= 0.5
pos
, [ ) ]
Inv, ½
x x
Inv
[ ) ]
prob
= 0.8074,
x pos
= 6, = 0.4
[ ) ]
prob
= 0.875,
Chapter 2: Main Application 89