condition mean min max ZT0-3 1.0882100000000001 1.0882100000000001 1.0882100000000001 ZT4-7 1.6024734999999999 1.6024734999999999 1.6024734999999999 ZT8-11 1.62413 1.62413 1.62413 ZT12-15 0.8501105 0.8501105 0.8501105 ZT16-19 0.57585 0.57585 0.57585 ZT20-23 0.8072619999999999 0.8072619999999999 0.8072619999999999