condition mean min max ZT0-3 163.3 163.3 163.3 ZT4-7 216.1 216.1 216.1 ZT8-11 213.25 213.25 213.25 ZT12-15 202.2 202.2 202.2 ZT16-19 174.3 174.3 174.3 ZT20-23 176.0 176.0 176.0