condition mean min max ZT0-3 1.43224 0.6001675 2.144895 ZT4-7 0.9209134999999999 0.9209134999999999 0.9209134999999999 ZT8-11 0.706914 0.706914 0.706914 ZT12-15 1.230165 1.09589 1.36444 ZT16-19 1.4499339999999998 1.4499339999999998 1.4499339999999998 ZT20-23 2.5208500000000003 2.5208500000000003 2.5208500000000003