condition mean min max ZT0-3 1.5625488212499998 0.284244903 2.8408527395 ZT4-7 13.7271384365 10.344731958 17.109544915 ZT8-11 23.573966454999997 20.032342784999997 27.115590124999997 ZT12-15 41.6112700125 35.722593215 47.49994681 ZT16-19 37.779670949999996 35.512822655 40.046519245 ZT20-23 37.801116445 36.909518475 38.692714415