condition mean min max ZT0-3 264.85 264.85 264.85 ZT4-7 431.7 431.7 431.7 ZT8-11 475.15 475.15 475.15 ZT12-15 401.05 401.05 401.05 ZT16-19 417.3 417.3 417.3 ZT20-23 316.95 316.95 316.95