when do clusters have significance tests why use a statistical significance test is sst valid for cluster analysis what is statistical significance test which statistical testing tool is used to validate cluster results? why does cluster analysis need to be used when assessing clusters, significance should be tested what test is used to confirm clustering why use a statistical significance test cluster analysis when is statistical significance test used to validate cluster data what type of statistical tests validate cluster analysis can sst be used to validate cluster data why sst is not appropriate for cluster analysis why is it necessary to use statistical significance testing does clustering test statistical significance which is the statistical significance test used to validate cluster analysis? what is the significance of cluster testing when to use sst in cluster analysis why use sst to test cluster analysis can significance tests validate cluster analysis