condition mean min max ZT0-3 0.4740573 0.3473319 0.668495 ZT4-7 0.0 0.0 0.0 ZT8-11 0.218364 0.218364 0.218364 ZT12-15 0.0 0.0 0.0 ZT16-19 0.29188 0.29188 0.29188 ZT20-23 0.4601455 0.4601455 0.4601455