condition mean min max ZT0-3 215.95 215.95 215.95 ZT4-7 199.7 199.7 199.7 ZT8-11 208.5 208.5 208.5 ZT12-15 227.3 227.3 227.3 ZT16-19 308.20000000000005 308.20000000000005 308.20000000000005 ZT20-23 293.70000000000005 293.70000000000005 293.70000000000005