condition mean min max ZT0-3 0.6660094999999999 0.6660094999999999 0.6660094999999999 ZT4-7 0.16522255 0.16522255 0.16522255 ZT8-11 0.2520785 0.2520785 0.2520785 ZT12-15 0.6123540000000001 0.6123540000000001 0.6123540000000001 ZT16-19 2.720265 2.720265 2.720265 ZT20-23 2.07796 2.07796 2.07796