condition mean min max ZT0-3 7.6332109930000005 7.424517037 7.841904949 ZT4-7 13.1625180375 11.25325791 15.071778165000001 ZT8-11 22.944791227499998 17.541937915 28.34764454 ZT12-15 17.560708097499997 14.831905195000001 20.289510999999997 ZT16-19 8.9350230085 8.7908563195 9.0791896975 ZT20-23 6.45684211675 5.2827828055 7.630901428