condition mean min max ZT0-3 913.5999999999999 913.5999999999999 913.5999999999999 ZT4-7 743.0 743.0 743.0 ZT8-11 894.6500000000001 894.6500000000001 894.6500000000001 ZT12-15 822.25 822.25 822.25 ZT16-19 937.0 937.0 937.0 ZT20-23 1015.6 1015.6 1015.6