condition mean min max ZT0-3 1.51311 0.0 4.53933 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 2.1175025 0.0 4.235005 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0