condition mean min max ZT0-3 124.16251666666668 75.80455 168.06650000000002 ZT4-7 78.45875000000001 78.45875000000001 78.45875000000001 ZT8-11 81.1144 81.1144 81.1144 ZT12-15 116.93449999999999 114.116 119.75299999999999 ZT16-19 142.3055 142.3055 142.3055 ZT20-23 194.639 194.639 194.639