Calculate > Probability Distributions > Geometric Calculate > Probability Distributions > Geometric This utility computes the probability density, cumulative probability, and inverse cumulative probability of the geometric distribution. You can choose between the two variants of the geometric distribution: (1) the probability distribution of the number of trials needed to get the first success, and (2) the probability distribution of the number of failures before the first success. Distribution Parameters: Specify the success probability (must be between 0 and 1). Choose the variant of the geometric distribution: Model the number of trials needed to produce the first success Model the number of failures before the first success Compute: Select the desired type of computation. Input(s): If the input data is in a column in the current Datasheet, select the Column radio button and the column name in the drop-down menu. In the input data is a single constant, select the Constant radio button and enter the input value in the provided text box. Store Results in: (optional) Computed results can be stored in a column of the current Datasheet. If storing results is desired, enter the column name or variable name in the provided text box.