condition mean min max ZT0-3 0.5830759999999999 0.5830759999999999 0.5830759999999999 ZT4-7 0.33035950000000003 0.33035950000000003 0.33035950000000003 ZT8-11 0.147128 0.147128 0.147128 ZT12-15 0.2024895 0.2024895 0.2024895 ZT16-19 1.2734625 1.2734625 1.2734625 ZT20-23 0.4495565 0.4495565 0.4495565