condition mean min max ZT0-3 275.25 275.25 275.25 ZT4-7 162.7 162.7 162.7 ZT8-11 142.2 142.2 142.2 ZT12-15 104.6 104.6 104.6 ZT16-19 108.25 108.25 108.25 ZT20-23 179.15 179.15 179.15