condition mean min max ZT0-3 21.65 21.65 21.65 ZT4-7 40.0 40.0 40.0 ZT8-11 48.25 48.25 48.25 ZT12-15 37.45 37.45 37.45 ZT16-19 43.2 43.2 43.2 ZT20-23 34.45 34.45 34.45