step  To run a cluster analysis with four clusters, reopen the K-Means Cluster Analysis dialog box.

step  Type 4 as the number of clusters.

step  Click Save.

step  Select Cluster membership and Distance from cluster center.

step  Click Continue.

step  Click OK in the K-Means Cluster Analysis dialog box.

These selections produce a four-cluster solution. The distances from cluster center and cluster membership information for each case are saved to the working file as new variables.

step  The saved variables can be used to create a useful boxplot. From the menus, choose:

Graphs
  Boxplot...

step  Click Define.

step  Select Distance of Case from its Classification Cluster Center as the analysis variable.

step  Select Cluster Number of Case as the category axis variable.

step  Click OK.