condition mean min max ZT0-3 1.0215545 0.565502 1.4683950000000001 ZT4-7 0.744292 0.744292 0.744292 ZT8-11 0.327936 0.327936 0.327936 ZT12-15 1.5670250000000001 1.54807 1.58598 ZT16-19 1.66844 1.66844 1.66844 ZT20-23 1.7598099999999999 1.7598099999999999 1.7598099999999999