condition mean min max ZT0-3 233.04333333333332 226.1925 241.887 ZT4-7 198.65 198.65 198.65 ZT8-11 140.269 140.269 140.269 ZT12-15 131.30275 125.7125 136.893 ZT16-19 149.26999999999998 149.26999999999998 149.26999999999998 ZT20-23 167.75799999999998 167.75799999999998 167.75799999999998