condition mean min max ZT0-3 0.430785 0.3809035 0.4806665 ZT4-7 0.604353 0.604353 0.604353 ZT8-11 0.198307 0.198307 0.198307 ZT12-15 0 0 0 ZT16-19 0.571005 0.571005 0.571005 ZT20-23 1.131462 1.131462 1.131462