condition mean min max ZT0-3 0.1021495 0.0 0.204299 ZT4-7 0.40550050000000004 0.40550050000000004 0.40550050000000004 ZT8-11 0.100881 0.100881 0.100881 ZT12-15 0 0 0 ZT16-19 0.3016225 0.3016225 0.3016225 ZT20-23 0.302122 0.302122 0.302122