condition mean min max ZT0-3 321.8 321.8 321.8 ZT4-7 968.4 968.4 968.4 ZT8-11 696.6 696.6 696.6 ZT12-15 498.90000000000003 498.90000000000003 498.90000000000003 ZT16-19 349.6 349.6 349.6 ZT20-23 250.95000000000002 250.95000000000002 250.95000000000002