condition mean min max ZT0-3 36.45 36.45 36.45 ZT4-7 34.9 34.9 34.9 ZT8-11 54.1 54.1 54.1 ZT12-15 27.55 27.55 27.55 ZT16-19 41.25 41.25 41.25 ZT20-23 76.5 76.5 76.5