condition mean min max ZT0-3 0.39049100000000003 0.39049100000000003 0.39049100000000003 ZT4-7 0.06487535 0.06487535 0.06487535 ZT8-11 0.176674 0.176674 0.176674 ZT12-15 0.0749633 0.0749633 0.0749633 ZT16-19 0.0853052 0.0853052 0.0853052 ZT20-23 0.3652145 0.3652145 0.3652145