condition mean min max ZT0-3 1.79996 1.79996 1.79996 ZT4-7 1.3959065 1.3959065 1.3959065 ZT8-11 0.31826750000000004 0.31826750000000004 0.31826750000000004 ZT12-15 0.606979 0.606979 0.606979 ZT16-19 1.41233 1.41233 1.41233 ZT20-23 1.7156500000000001 1.7156500000000001 1.7156500000000001