condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.3399485 0.3399485 0.3399485 ZT8-11 0.1257945 0.1257945 0.1257945 ZT12-15 0.097452 0.097452 0.097452 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0