Launch the Contingency Platform
Launch the Contingency platform by selecting Analyze > Fit Y by X. The Fit Y by X launch window is used for four different types of analyses. When you enter an ordinal or nominal Y variable and an ordinal or nominal X variable, the Contingency platform is launched.
Figure 7.3 The Contingency Launch Window
For more information about the options in the Select Columns red triangle menu, see “Column Filter Menu” in Using JMP. The Contingency launch window contains the following options:
Y, Response
The response variable or variables that you want to analyze. These variables must have an ordinal or nominal modeling type.
X, Factor
The predictor variable or variables that you want to analyze. These variables must have an ordinal or nominal modeling type.
Block
A column that specifies a Blocking variable. Specifying a Block variable identifies a second factor and performs a Cochran-Mantel-Haenszel test. Blocking across an additional classification variable is also called stratification.
Weight
A column containing a weight for each observation in the data table. A row is included in the analyses only when its value is greater than zero.
Freq
Assigns a frequency to each row in the analysis. Assigning a frequency is useful when your data are summarized.
By
Produces a separate report for each level of the By variable. If more than one By variable is assigned, a separate report is produced for each possible combination of the levels of the By variables.
Data Format
In the Contingency platform, your data can consist of unsummarized or summarized data:
Unsummarized data
There is one row for each observation and columns for X and Y values.
Summarized data
Each row represents a set of observations with common X and Y values. The data table must contain a frequency column that contains the counts of observations for each row. Enter this column as Freq in the launch window.
For an example of summarized categorical data, see Example of Analysis of Means for Proportions.
Note: The Fit Y by X launch window accommodates columns with continuous, ordinal, and nominal modeling types. The Contingency platform is launched for all pairs of Y, Response and X, Factor columns that have the ordinal or nominal modeling types. The Fit Y by X launch window launches the Bivariate, Oneway, or Logistic platforms for other column type combinations.