condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.029793516000000003 0.0 0.059587032000000005 ZT20-23 0.0747503505 0.0 0.149500701