condition mean min max ZT0-3 1007.0500000000001 1007.0500000000001 1007.0500000000001 ZT4-7 834.3 834.3 834.3 ZT8-11 968.6 968.6 968.6 ZT12-15 1024.4499999999998 1024.4499999999998 1024.4499999999998 ZT16-19 1099.05 1099.05 1099.05 ZT20-23 1152.75 1152.75 1152.75