ubinomialCDf [Action][Distribution/Inv.Dist][Discrete][binomialCDf]

Function: Returns the cumulative probability in a binomial distribution that the success will occur between specified lower value and upper value.

Syntax: binomialCDf(lower value, upper value, numtrial value, pos [ ) ]

Calculation Result Output: prob

Example: To determine the binomial cumulative probability when lower value = 2, upper value = 5, numtrial value = 3, pos = 0.63

uinvBinomialCDf [Action][Distribution/Inv.Dist][Inverse][invBinomialCDf]

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

Syntax: invBinomialCDf(prob, numtrial value, pos [ ) ]

Calculation Result Output: xInv, ￿xInv

Important!

When executing the invBinomialCDf, invPoissonCDf, invGeoCDf, or invHypergeoCDf function, the ClassPad 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 function always returns the xInv value only. However, when the xInv and ￿xInv values are different, the warning message shown nearby appears showing both values.

The calculation results of the function are integers. Accuracy may be reduced

when the first argument has 10 or more digits. Note that even a slight difference in calculation accuracy affects calculation results. If a warning message appears, check the displayed values.

Example: To determine the minimum number of trials when prob = 0.609, numtrial value = 5, pos = 0.63

upoissonPDf [Action][Distribution/Inv.Dist][Discrete][poissonPDf]

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

Syntax: poissonPDf(x,  [ ) ]

Calculation Result Output: prob

Example: To determine the Poisson probability when x = 10,  = 6

upoissonCDf [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: prob

Example: To determine the Poisson cumulative probability when lower value = 2, upper value = 3,  = 2.26

uinvPoissonCDf [Action][Distribution/Inv.Dist][Inverse][invPoissonCDf]

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

Syntax: invPoissonCDf(prob,  [ ) ]

Calculation Result Output: xInv, ￿xInv

Chapter 2: Main Application

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