condition mean min max ZT0-3 0.3721776985 0.0 0.744355397 ZT4-7 1.609419766 1.3070156805000002 1.9118238515 ZT8-11 2.4275135755 2.3363895980000002 2.5186375529999996 ZT12-15 1.9881738085000003 1.6293766435 2.3469709735000004 ZT16-19 1.1974441535 1.1060104325 1.2888778745 ZT20-23 0.8658249739999999 0.626610539 1.105039409