condition mean min max ZT0-3 457.35 457.35 457.35 ZT4-7 613.7 613.7 613.7 ZT8-11 775.8 775.8 775.8 ZT12-15 678.8 678.8 678.8 ZT16-19 570.45 570.45 570.45 ZT20-23 482.85 482.85 482.85