condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.252559649 0.192491055 0.31262824300000003 ZT8-11 0.24062261075 0.122310221 0.3589350005 ZT12-15 2.7611198662499996 2.001556156 3.5206835764999997 ZT16-19 3.0859929595 2.7321113605000003 3.4398745584999997 ZT20-23 2.3954687404999997 1.7665002035 3.0244372774999997