condition mean min max ZT0-3 1.45519125 1.1790875 1.731295 ZT4-7 2.51938 2.51938 2.51938 ZT8-11 2.278265 2.278265 2.278265 ZT12-15 0 0 0 ZT16-19 2.6916700000000002 2.6916700000000002 2.6916700000000002 ZT20-23 2.70472 2.70472 2.70472