condition mean min max ZT0-3 0.8486447500000001 0.39575950000000004 1.30153 ZT4-7 1.19093 1.19093 1.19093 ZT8-11 0.39861349999999995 0.39861349999999995 0.39861349999999995 ZT12-15 0 0 0 ZT16-19 0.906879 0.906879 0.906879 ZT20-23 1.1734 1.1734 1.1734