condition mean min max ZT0-3 118.35019084 69.52659778 167.1737839 ZT4-7 231.53521685 218.44182675000002 244.62860695 ZT8-11 97.75506913249998 61.226144905 134.28399335999998 ZT12-15 13.194086314249999 10.349714990999999 16.0384576375 ZT16-19 46.2189574875 36.139324695 56.29859028 ZT20-23 63.55699378 61.022892055 66.091095505