condition mean min max ZT0-3 0.11099200000000001 0.0369449 0.1850391 ZT4-7 0.37084649999999997 0.37084649999999997 0.37084649999999997 ZT8-11 0.1861755 0.1861755 0.1861755 ZT12-15 0 0 0 ZT16-19 0.21857500000000002 0.21857500000000002 0.21857500000000002 ZT20-23 0.03674215 0.03674215 0.03674215