condition mean min max ZT0-3 6.818099999999999 6.78627 6.84993 ZT4-7 2.537205 2.537205 2.537205 ZT8-11 0.6235115 0.6235115 0.6235115 ZT12-15 0 0 0 ZT16-19 0.5393035 0.5393035 0.5393035 ZT20-23 2.9073700000000002 2.9073700000000002 2.9073700000000002