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Chapter 5 Properties and Characteristics of Data 161
Assigning Properties to Columns
4 Click OK. The properties icon ( ) now appears next to the column name in the data table’s
column panel, indicating the column contains a property.
Selecting a Distribution Type for the Column
For a column that contains continuous numeric data, you can select the Distribution column property
to produce the following results in the Distribution report:
• Whenever you run the Distribution report (Analyze > Distribution) for the column, JMP
automatically estimates a fit using the distribution specified and draws the curve representing how
the column’s data is distributed.
By default, a column has no Distribution column property. If you do not select the Distribution
column property, then JMP does not draw the column’s fit curve in the distribution nor does JMP
report any information about the fit. (You could add this information to the Distribution report
after you run it, of course.)
• If you set both the Distribution type and the Spec Limits column property (“Entering Specification,
Control, and Response Limits,” p. 156), then the Distribution report produces a Capability
Analysis report table that is of the distribution type you selected for the column.
Set the Distribution column property only when you already know how the data is distributed (for
example, you might already know before you run Analyze > Distribution that the data has a Weibull
distribution).
There are two ways to add the Distribution column property. The first way is as follows:
1 Double-click the column name in the data grid. The Column Info window appears.
2 Select Distribution from the Column Properties drop-down menu.
3 Select the type of distribution you want to use for the column, as shown in Figure 5.36.
5 Data Properties