condition mean min max ZT0-3 0.38953249999999995 0.2744 0.5046649999999999 ZT4-7 0.4774435 0.4774435 0.4774435 ZT8-11 0.5835925 0.5835925 0.5835925 ZT12-15 0 0 0 ZT16-19 1.5670250000000001 1.5670250000000001 1.5670250000000001 ZT20-23 0.7792304999999999 0.7792304999999999 0.7792304999999999