The Factor Analysis red triangle menu contains the following options:
Eigenvalues
Shows or hides a table of the eigenvalues of the original correlation, covariance, or unscaled and uncentered matrix. The table includes the percent of the total variance represented by each eigenvalue, a bar chart illustrating the percent contribution, and the cumulative percent contributed by each successive eigenvalue. The number of eigenvalues that are greater than or equal to 1.0 can be taken as a guideline of the number of factors for analysis.
Scree Plot
Shows or hides a plot of the eigenvalues versus the number of components (or factors). The plot can be used as an additional guideline to determine the number of factors that contribute to the maximum amount of variance. The point at which the plotted line levels out can be used as the number of sufficient factors for analysis.
Bartlett’s Test of Sphericity
Shows or hides the results of the Bartlett’s Test of Sphericity. This test is a homogeneity test that determines whether the eigenvalues have the same variance by calculating the Chi-square, degrees of freedom (DF), and the p-value (prob > ChiSq) for the test. See Bartlett (1937, 1954).
Kaiser-Meyer-Olkin Test
Shows or hides the results of the Kaiser-Meyer-Olkin (KMO) test. The test is an indicator of the proportion of variance that might be common variance, potentially due to underlying factors. The test statistic is calculated for each individual variable and for the set of all variables and is referred to as the Measure of Sampling Adequacy (MSA) in JMP. The following values indicate the suitability of the variables for factor analysis:
– 0.00 to 0.49 unacceptable
– 0.50 to 0.59 miserable
– 0.60 to 0.69 mediocre
– 0.70 to 0.79 middling
– 0.80 to 0.89 meritorious
– 0.90 to 1.00 marvelous
Note: The KMO test is not available if the correlation matrix is singular.
See Local Data Filters in JMP Reports, Redo Menus in JMP Reports, Group Platform, and Save Script Menus in JMP Reports in Using JMP for more information about the following options:
Local Data Filter
Shows or hides the local data filter that enables you to filter the data used in a specific report.
Redo
Contains options that enable you to repeat or relaunch the analysis. In platforms that support the feature, the Automatic Recalc option immediately reflects the changes that you make to the data table in the corresponding report window.
Platform Preferences
Contains options that enable you to view the current platform preferences or update the platform preferences to match the settings in the current JMP report.
Save Script
Contains options that enable you to save a script that reproduces the report to several destinations.
Save By-Group Script
Contains options that enable you to save a script that reproduces the platform report for all levels of a By variable to several destinations. Available only when a By variable is specified in the launch window.
Note: Additional options for this platform are available through scripting. Open the Scripting Index under the Help menu. In the Scripting Index, you can also find examples for scripting the options that are described in this section.