condition mean min max ZT0-3 0.6901355 0.2736745 1.1065965 ZT4-7 0.0563365 0.0563365 0.0563365 ZT8-11 2.4947549999999996 2.4947549999999996 2.4947549999999996 ZT12-15 0 0 0 ZT16-19 9.52411 9.52411 9.52411 ZT20-23 4.8149049999999995 4.8149049999999995 4.8149049999999995