condition mean min max ZT0-3 1.93053 0.947175 2.913885 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 2.864235 2.864235 2.864235 ZT20-23 2.8727549999999997 2.8727549999999997 2.8727549999999997