condition mean min max ZT0-3 0.3082923365 0.165231708 0.451352965 ZT4-7 0.283628545 0.2660998065 0.3011572835 ZT8-11 0.1706085735 0.106406322 0.234810825 ZT12-15 0.23818888500000002 0.22557472399999998 0.25080304600000003 ZT16-19 0.38780155475 0.21045998200000002 0.5651431275 ZT20-23 0.3227258865 0.28608034400000004 0.35937142899999996