condition mean min max ZT0-3 2.2609095 1.050809 3.4710099999999997 ZT4-7 1.7593 1.7593 1.7593 ZT8-11 4.95581 4.95581 4.95581 ZT12-15 0 0 0 ZT16-19 0.6885600000000001 0.6885600000000001 0.6885600000000001 ZT20-23 0.3445625 0.3445625 0.3445625