condition mean min max ZT0-3 160.2 160.2 160.2 ZT4-7 241.8 241.8 241.8 ZT8-11 236.4 236.4 236.4 ZT12-15 280.35 280.35 280.35 ZT16-19 253.3 253.3 253.3 ZT20-23 212.75 212.75 212.75