condition mean min max ZT0-3 1.5090430000000001 1.497295 1.520791 ZT4-7 0.6030155 0.6030155 0.6030155 ZT8-11 0.46376549999999994 0.46376549999999994 0.46376549999999994 ZT12-15 0 0 0 ZT16-19 1.739535 1.739535 1.739535 ZT20-23 1.0146675 1.0146675 1.0146675