condition mean min max ZT0-3 0.8118394999999999 0.6050964999999999 0.990229 ZT4-7 0.36231 0.36231 0.36231 ZT8-11 0.22226800000000002 0.22226800000000002 0.22226800000000002 ZT12-15 0.42366875 0.317199 0.5301385 ZT16-19 0.3420085 0.3420085 0.3420085 ZT20-23 0.49027350000000003 0.49027350000000003 0.49027350000000003