condition mean min max ZT0-3 27.5077347075 24.32226784 30.693201575 ZT4-7 33.54136057 27.834789065000002 39.247932075 ZT8-11 43.43818828249999 39.670479979999996 47.205896585 ZT12-15 35.033922945 30.817502665 39.250343225 ZT16-19 47.1290573575 42.14516587 52.112948845 ZT20-23 53.9973004975 53.69197258 54.302628415