condition mean min max ZT0-3 10.75 10.75 10.75 ZT4-7 10.5 10.5 10.5 ZT8-11 14.0 14.0 14.0 ZT12-15 10.55 10.55 10.55 ZT16-19 10.25 10.25 10.25 ZT20-23 3.55 3.55 3.55