calculate an out degree ratio by dividing a number of out degree correlation coefficients above {TAIL ~ a third threshold} by {HEAD ~ a total number} of out degree correlation coefficients 
calculate an out degree ratio by dividing a number of out degree correlation coefficients above { TAIL ~ a third threshold } by { HEAD ~ a total number } of out degree correlation coefficients
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH