condition mean min max ZT0-3 46.9605 22.53425 59.6634 ZT4-7 18.880850000000002 18.880850000000002 18.880850000000002 ZT8-11 29.6575 29.6575 29.6575 ZT12-15 36.84335 35.46 38.2267 ZT16-19 47.456450000000004 47.456450000000004 47.456450000000004 ZT20-23 60.5687 60.5687 60.5687