condition mean min max ZT0-3 0.49572750000000004 0.40617000000000003 0.585285 ZT4-7 0.9110665 0.9110665 0.9110665 ZT8-11 1.53186 1.53186 1.53186 ZT12-15 0 0 0 ZT16-19 0.9481775000000001 0.9481775000000001 0.9481775000000001 ZT20-23 0.6804425 0.6804425 0.6804425