condition mean min max ZT0-3 6.059329999999999 6.059329999999999 6.059329999999999 ZT4-7 4.30042 4.30042 4.30042 ZT8-11 3.55844 3.55844 3.55844 ZT12-15 3.282825 3.282825 3.282825 ZT16-19 4.96327 4.96327 4.96327 ZT20-23 5.52168 5.52168 5.52168