condition mean min max ZT0-3 0.49220549999999996 0.49220549999999996 0.49220549999999996 ZT4-7 0.2396847 0.2396847 0.2396847 ZT8-11 0.2054388 0.2054388 0.2054388 ZT12-15 0.24958045 0.24958045 0.24958045 ZT16-19 0.6652929999999999 0.6652929999999999 0.6652929999999999 ZT20-23 0.4324885 0.4324885 0.4324885