condition mean min max ZT0-3 203.5 203.5 203.5 ZT4-7 170.1 170.1 170.1 ZT8-11 151.15 151.15 151.15 ZT12-15 170.89999999999998 170.89999999999998 170.89999999999998 ZT16-19 163.5 163.5 163.5 ZT20-23 207.75 207.75 207.75