condition mean min max ZT0-3 1664.8999999999999 1664.8999999999999 1664.8999999999999 ZT4-7 1203.2 1203.2 1203.2 ZT8-11 919.8499999999999 919.8499999999999 919.8499999999999 ZT12-15 616.9 616.9 616.9 ZT16-19 569.6 569.6 569.6 ZT20-23 1098.8 1098.8 1098.8