condition mean min max ZT0-3 0.5143557569999999 0.298457148 0.7302543659999999 ZT4-7 1.8320624925 1.3927638915 2.2713610935 ZT8-11 3.3250837075 3.0061775775 3.6439898375 ZT12-15 1.9895196325 1.4520163075 2.5270229575 ZT16-19 2.5863825124999997 1.9662678649999998 3.2064971599999996 ZT20-23 3.3333034472499996 3.009091006 3.6575158885