condition mean min max ZT0-3 27.35 27.35 27.35 ZT4-7 25.6 25.6 25.6 ZT8-11 47.45 47.45 47.45 ZT12-15 38.15 38.15 38.15 ZT16-19 51.0 51.0 51.0 ZT20-23 46.55 46.55 46.55