condition mean min max ZT0-3 1012.6 1012.6 1012.6 ZT4-7 555.7 555.7 555.7 ZT8-11 605.7 605.7 605.7 ZT12-15 688.5 688.5 688.5 ZT16-19 754.9 754.9 754.9 ZT20-23 1049.5 1049.5 1049.5