condition mean min max ZT0-3 0.1044716 0.0878228 0.1132695 ZT4-7 0.054961 0.054961 0.054961 ZT8-11 0.083793 0.083793 0.083793 ZT12-15 0.2892895 0.1160715 0.46250749999999996 ZT16-19 0.23886600000000002 0.23886600000000002 0.23886600000000002 ZT20-23 0.20968900000000001 0.20968900000000001 0.20968900000000001