condition mean min max ZT0-3 0.6700790000000001 0.4849065 0.8552515 ZT4-7 0.182521 0.182521 0.182521 ZT8-11 0.550373 0.550373 0.550373 ZT12-15 0 0 0 ZT16-19 0.7813060000000001 0.7813060000000001 0.7813060000000001 ZT20-23 0.30153399999999997 0.30153399999999997 0.30153399999999997