condition mean min max ZT0-3 468.0 468.0 468.0 ZT4-7 537.8 537.8 537.8 ZT8-11 651.75 651.75 651.75 ZT12-15 675.9 675.9 675.9 ZT16-19 613.25 613.25 613.25 ZT20-23 555.1 555.1 555.1