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 0.04322325 0.0 0.0864465 ZT16-19 0.0720595 0.0720595 0.0720595 ZT20-23 0.0846955 0.0846955 0.0846955