condition mean min max ZT0-3 1.852435 1.852435 1.852435 ZT4-7 1.1813500000000001 1.1813500000000001 1.1813500000000001 ZT8-11 0.5081445 0.5081445 0.5081445 ZT12-15 1.0414284999999999 1.0414284999999999 1.0414284999999999 ZT16-19 3.859325 3.859325 3.859325 ZT20-23 1.87503 1.87503 1.87503