condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0266333 0.0266333 0.0266333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.00733495 0.0 0.0146699 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0142158 0.0142158 0.0142158