condition mean min max ZT0-3 504.29999999999995 504.29999999999995 504.29999999999995 ZT4-7 389.4 389.4 389.4 ZT8-11 740.3 740.3 740.3 ZT12-15 881.3499999999999 881.3499999999999 881.3499999999999 ZT16-19 695.05 695.05 695.05 ZT20-23 582.15 582.15 582.15