condition mean min max ZT0-3 30.9248056375 26.33445423 35.515157045 ZT4-7 27.901568232499997 26.61122717 29.191909295 ZT8-11 60.8762095225 44.087124215 77.66529483 ZT12-15 147.1227706125 117.392736175 176.85280505 ZT16-19 106.20166429000001 100.60984278000001 111.79348580000001 ZT20-23 160.9801427 143.6209867 178.3392987