condition mean min max ZT0-3 1012.733746 1012.733746 1012.733746 ZT4-7 955.3968024999999 955.3968024999999 955.3968024999999 ZT8-11 789.328754 789.328754 789.328754 ZT12-15 574.414927 574.414927 574.414927 ZT16-19 786.361751 786.361751 786.361751 ZT20-23 915.7645485 915.7645485 915.7645485