condition mean min max ZT0-3 4.3083175 3.05008 5.566555 ZT4-7 2.897895 2.897895 2.897895 ZT8-11 1.85786 1.85786 1.85786 ZT12-15 0 0 0 ZT16-19 6.48315 6.48315 6.48315 ZT20-23 4.27607 4.27607 4.27607