condition mean min max ZT0-3 29.880054 29.880054 29.880054 ZT4-7 44.81599 44.81599 44.81599 ZT8-11 50.6349765 50.6349765 50.6349765 ZT12-15 55.0949175 55.0949175 55.0949175 ZT16-19 47.5513195 47.5513195 47.5513195 ZT20-23 42.847377 42.847377 42.847377