condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.3368265 0.3368265 0.3368265 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.291314 0.291314 0.291314 ZT20-23 0.1459855 0.1459855 0.1459855