condition mean min max ZT0-3 0.74573188525 0.41524472799999995 1.0762190425 ZT4-7 2.84031617625 2.5238718705 3.156760482 ZT8-11 3.272612902 3.210121814 3.3351039900000004 ZT12-15 9.04960572225 5.7560665355000005 12.343144909 ZT16-19 8.047680046 7.986622572 8.10873752 ZT20-23 8.954492466 8.8032344695 9.1057504625