condition mean min max ZT0-3 47.02525 46.5614 47.4891 ZT4-7 32.778 32.778 32.778 ZT8-11 36.47815 36.47815 36.47815 ZT12-15 0 0 0 ZT16-19 58.06755 58.06755 58.06755 ZT20-23 53.91075 53.91075 53.91075