condition mean min max ZT0-3 1.27804275 1.1409955 1.41509 ZT4-7 1.75477 1.75477 1.75477 ZT8-11 5.015035 5.015035 5.015035 ZT12-15 0 0 0 ZT16-19 3.5988949999999997 3.5988949999999997 3.5988949999999997 ZT20-23 2.6299099999999997 2.6299099999999997 2.6299099999999997