condition mean min max ZT0-3 0.02915125 0.0 0.0583025 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.117692 0.117692 0.117692 ZT20-23 0.237095 0.237095 0.237095