condition mean min max ZT0-3 74.6265 45.695499999999996 103.5575 ZT4-7 3.3104880000000003 3.3104880000000003 3.3104880000000003 ZT8-11 2.695035 2.695035 2.695035 ZT12-15 0 0 0 ZT16-19 16.39691 16.39691 16.39691 ZT20-23 12.538155 12.538155 12.538155