condition mean min max ZT0-3 0.27875575 0.1107616 0.5450755 ZT4-7 0.490973 0.490973 0.490973 ZT8-11 0.6786570000000001 0.6786570000000001 0.6786570000000001 ZT12-15 0.64316525 0.6234729999999999 0.6628575 ZT16-19 0.4367265 0.4367265 0.4367265 ZT20-23 0.373516 0.373516 0.373516