condition mean min max ZT0-3 42.104895 42.104895 42.104895 ZT4-7 46.349033500000004 46.349033500000004 46.349033500000004 ZT8-11 34.6671315 34.6671315 34.6671315 ZT12-15 40.909341999999995 40.909341999999995 40.909341999999995 ZT16-19 38.0792955 38.0792955 38.0792955 ZT20-23 28.524550499999997 28.524550499999997 28.524550499999997