condition mean min max ZT0-3 568.4 568.4 568.4 ZT4-7 401.7 401.7 401.7 ZT8-11 414.90000000000003 414.90000000000003 414.90000000000003 ZT12-15 466.65 466.65 466.65 ZT16-19 600.9000000000001 600.9000000000001 600.9000000000001 ZT20-23 449.9 449.9 449.9