condition mean min max ZT0-3 317.4 317.4 317.4 ZT4-7 196.9 196.9 196.9 ZT8-11 156.75 156.75 156.75 ZT12-15 175.15 175.15 175.15 ZT16-19 297.25 297.25 297.25 ZT20-23 317.8 317.8 317.8