condition mean min max ZT0-3 305.95 305.95 305.95 ZT4-7 339.9 339.9 339.9 ZT8-11 229.55 229.55 229.55 ZT12-15 241.5 241.5 241.5 ZT16-19 246.25 246.25 246.25 ZT20-23 281.54999999999995 281.54999999999995 281.54999999999995