condition mean min max ZT0-3 178.03782932500002 144.95058345 211.1250752 ZT4-7 117.92514389749999 93.629830545 142.22045724999998 ZT8-11 91.54998206249999 70.60865437999999 112.491309745 ZT12-15 20.352035100000002 17.1297922 23.574278 ZT16-19 38.31117797 30.6687531 45.95360284 ZT20-23 75.67144590749999 67.83819625999999 83.504695555