condition mean min max ZT0-3 723.25 723.25 723.25 ZT4-7 482.7 482.7 482.7 ZT8-11 431.45000000000005 431.45000000000005 431.45000000000005 ZT12-15 492.4 492.4 492.4 ZT16-19 654.9 654.9 654.9 ZT20-23 827.45 827.45 827.45