condition mean min max ZT0-3 0.6946154999999999 0.6946154999999999 0.6946154999999999 ZT4-7 0.5800514999999999 0.5800514999999999 0.5800514999999999 ZT8-11 0.5344800000000001 0.5344800000000001 0.5344800000000001 ZT12-15 0.81118 0.81118 0.81118 ZT16-19 0.738973 0.738973 0.738973 ZT20-23 1.1597215 1.1597215 1.1597215