condition mean min max ZT0-3 213.75 213.75 213.75 ZT4-7 186.3 186.3 186.3 ZT8-11 220.5 220.5 220.5 ZT12-15 181.1 181.1 181.1 ZT16-19 119.25 119.25 119.25 ZT20-23 178.7 178.7 178.7