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162 Properties and Characteristics of Data Chapter 5
Assigning Properties to Columns
Figure 5.36 Selecting the Distribution Column Property
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.
The second way to add the distribution type to the window (along with the specification limits) is as
follows:
1 From the red triangle menu in the column’s report title bar, select Fit Distribution and select a type
of distribution. JMP draws a fit curve on the histogram and adds a report table for the fitted
distribution.
2 From the red triangle menu in the fitted distribution’s report table, select Spec Limits. Enter the
specification limits (“Entering Specification, Control, and Response Limits,” p. 156) to generate a
distribution-specific capability analysis.
3 From the same red triangle menu in the fitted distribution’s report table, select Save Spec Limits.
This saves both the specification limits and the associated distribution in the column properties for
future use.
Assigning a Time Frequency to Data
The Time Series platform sometimes needs to know the frequency that data is reported (Annual,
Monthly, Weekly, Daily, Hourly, Minute, Second). This lets JMP take things like leap years and leap
days into account. If no frequency is specified, the data is treated as equally spaced numeric data.