condition mean min max ZT0-3 70.20982666666667 70.20982666666667 70.20982666666667 ZT4-7 150.5233 150.5233 150.5233 ZT8-11 389.8827 389.8827 389.8827 ZT12-15 594.3931 594.3931 594.3931 ZT16-19 236.73180000000002 236.73180000000002 236.73180000000002 ZT20-23 163.31050000000002 163.31050000000002 163.31050000000002