condition mean min max ZT0-3 173.2 173.2 173.2 ZT4-7 197.1 197.1 197.1 ZT8-11 125.2 125.2 125.2 ZT12-15 134.55 134.55 134.55 ZT16-19 137.45 137.45 137.45 ZT20-23 163.45 163.45 163.45