condition mean min max ZT0-3 153.55 153.55 153.55 ZT4-7 137.6 137.6 137.6 ZT8-11 208.4 208.4 208.4 ZT12-15 202.65 202.65 202.65 ZT16-19 156.89999999999998 156.89999999999998 156.89999999999998 ZT20-23 151.5 151.5 151.5