condition mean min max ZT0-3 111.040762 111.040762 111.040762 ZT4-7 12.037783000000001 12.037783000000001 12.037783000000001 ZT8-11 12.081282999999999 12.081282999999999 12.081282999999999 ZT12-15 10.236197 10.236197 10.236197 ZT16-19 10.517714 10.517714 10.517714 ZT20-23 10.202399 10.202399 10.202399