condition mean min max ZT0-3 117.91223798000001 110.20519876 125.61927720000001 ZT4-7 28.00030902225 16.6026440095 39.397974035 ZT8-11 22.8109562 13.176296014999998 32.445616385 ZT12-15 52.655172164999996 43.17085142 62.13949291 ZT16-19 91.2780191825 81.71846123 100.837577135 ZT20-23 120.135898575 119.44178885000001 120.8300083