condition mean min max ZT0-3 0.8416125 0.331557 1.28289 ZT4-7 0.22757850000000002 0.22757850000000002 0.22757850000000002 ZT8-11 0.814129 0.814129 0.814129 ZT12-15 1.5451074999999999 1.4216799999999998 1.668535 ZT16-19 1.583605 1.583605 1.583605 ZT20-23 1.39412 1.39412 1.39412