Select the type of probability

Choose Calc > Probability Distributions and choose a distribution.
Select the type of information about the distribution that you want to calculate.
Probability density
The probability density function helps identify regions of higher and lower probabilities for values of a random variable. For more information, go to Using the probability density function (PDF).
Cumulative probability
The cumulative distribution function (CDF) calculates the cumulative probability for a given x-value. Use the CDF to determine the probability that a random observation that is taken from the population is less than or equal to a certain value. You can also use this information to determine the probability that an observation is greater than a certain value, or between two values. For more information, go to Using the cumulative distribution function (CDF).
Inverse cumulative probability
The inverse cumulative distribution function gives the value that is associated with a specific cumulative probability. Use the inverse CDF to determine the value of the variable associated with a specific probability. For more information, go to Using the inverse cumulative distribution function (ICDF).