condition mean min max ZT0-3 1.37516 1.37516 1.37516 ZT4-7 1.59892 1.59892 1.59892 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 1.413815 1.413815 1.413815 ZT20-23 0.0 0.0 0.0