The Distributional feature is available in JMP 14. Here is the documentation taken from the "Using JMP" document. The Distributional feature only appears if you right click on a numeric column.
Transform Columns
Each launch window in JMP enables you to create one or more temporary transform columns
for use in performing analyses. These transform columns are not part of the source data table
and only can be used within the context of the current launch window. Transform columns
use formulas or calculations to define the column values. Closing the launch window deletes
any transform columns.
Each column listed in the Select Columns pane of the launch window includes an icon
representing the column’s modeling type (continuous, ordinal, or nominal) and the column
name. Right-click on a column name to create a transform column using Transform, Character,
Combine, Pairwise, Aggregate, Distributional, Date Time, Random, Row, Vector, or Formula
to calculate the column’s values.
Right-click options depend on the selected column’s data type and number of columns
selected.
The "Using JMP" document is available @
Help==>Books==>Using JMP
Jim