condition mean min max ZT0-3 0.9180453064999998 0.152565954 1.6835246589999997 ZT4-7 4.67507502925 2.902758607 6.447391451500001 ZT8-11 5.115788564 5.1121110135 5.1194661145 ZT12-15 3.2915833497499998 3.120541698 3.4626250015 ZT16-19 2.20531993975 2.1376772945 2.272962585 ZT20-23 2.59879519825 2.4367677084999997 2.760822688