User Guide

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Chapter 31
Figure 31-1
TwoStep Cluster Analysis dialog box
Distance Measure. This selection determines how the similarity between two clusters
is computed.
 Log-likelihood. The likelihood measure places a probability distribution on the
variables. Continuous variables are assumed to be normally distributed, while
categorical variables are assumed to be multinomial. All variables are assumed to
be independent.
 Euclidean. The Euclidean measure is the “straight line” distance between two
clusters. It can be used only when all of the variables are continuous.
Number of Clusters. This selection allows you to specify how the number of clusters is
to be determined.