condition mean min max ZT0-3 6.1583749999999995 0.0 12.316749999999999 ZT4-7 3.13467 3.13467 3.13467 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 3.029915 3.029915 3.029915