condition mean min max ZT0-3 0.47349725 0.4155425 0.531452 ZT4-7 1.25611 1.25611 1.25611 ZT8-11 1.34305 1.34305 1.34305 ZT12-15 0 0 0 ZT16-19 1.61475 1.61475 1.61475 ZT20-23 2.12169 2.12169 2.12169