condition mean min max ZT0-3 0.2299725 0.2299725 0.2299725 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3167115 0.3167115 0.3167115 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0