condition mean min max ZT0-3 0.46018118 0.0 0.92036236 ZT4-7 0.06429989883333333 0.0 0.12859979766666665 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0