condition mean min max ZT0-3 174.15 174.15 174.15 ZT4-7 199.8 199.8 199.8 ZT8-11 163.3 163.3 163.3 ZT12-15 219.75 219.75 219.75 ZT16-19 196.75 196.75 196.75 ZT20-23 184.05 184.05 184.05