condition mean min max ZT0-3 0.39773250000000004 0.39773250000000004 0.39773250000000004 ZT4-7 0.296292 0.296292 0.296292 ZT8-11 0.5091829999999999 0.5091829999999999 0.5091829999999999 ZT12-15 0.538219 0.538219 0.538219 ZT16-19 1.0456400000000001 1.0456400000000001 1.0456400000000001 ZT20-23 0.6462680000000001 0.6462680000000001 0.6462680000000001