condition mean min max ZT0-3 10.45 10.45 10.45 ZT4-7 4.0 4.0 4.0 ZT8-11 18.95 18.95 18.95 ZT12-15 17.25 17.25 17.25 ZT16-19 10.0 10.0 10.0 ZT20-23 47.55 47.55 47.55