condition mean min max ZT0-3 1667.086325 1667.086325 1667.086325 ZT4-7 1390.559073 1390.559073 1390.559073 ZT8-11 741.7918095 741.7918095 741.7918095 ZT12-15 834.118856 834.118856 834.118856 ZT16-19 550.1264105 550.1264105 550.1264105 ZT20-23 815.5236285000001 815.5236285000001 815.5236285000001