condition mean min max ZT0-3 21.75 21.75 21.75 ZT4-7 88.2 88.2 88.2 ZT8-11 89.2 89.2 89.2 ZT12-15 84.75 84.75 84.75 ZT16-19 44.9 44.9 44.9 ZT20-23 16.6 16.6 16.6