condition mean min max ZT0-3 0.08572305 0.0145395 0.1823535 ZT4-7 0.05742735 0.05742735 0.05742735 ZT8-11 0.4188905 0.4188905 0.4188905 ZT12-15 0.99648325 0.7472015000000001 1.245765 ZT16-19 0.31427700000000003 0.31427700000000003 0.31427700000000003 ZT20-23 0.207565 0.207565 0.207565