condition mean min max ZT0-3 0.14091900000000002 0.0717015 0.2101365 ZT4-7 0.4336215 0.4336215 0.4336215 ZT8-11 0.0709375 0.0709375 0.0709375 ZT12-15 0 0 0 ZT16-19 0.14111849999999998 0.14111849999999998 0.14111849999999998 ZT20-23 1.3500555 1.3500555 1.3500555