condition mean min max ZT0-3 114.65 114.65 114.65 ZT4-7 101.3 101.3 101.3 ZT8-11 112.9 112.9 112.9 ZT12-15 131.1 131.1 131.1 ZT16-19 139.89999999999998 139.89999999999998 139.89999999999998 ZT20-23 117.05 117.05 117.05