In step 702, the process randomly selects {TAIL ~ K clusters} of probe match scores 110, averages probe match scores within {HEAD ~ each} of the clusters to obtain a mean as a center, and goes to step 704 
In step 702 , the process randomly selects { TAIL ~ K clusters } of probe match scores 110 , averages probe match scores within { HEAD ~ each } of the clusters to obtain a mean as a center , and goes to step 704
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH