condition mean min max ZT0-3 348.554804 348.554804 348.554804 ZT4-7 159.2256845 159.2256845 159.2256845 ZT8-11 233.723252 233.723252 233.723252 ZT12-15 338.55601149999995 338.55601149999995 338.55601149999995 ZT16-19 182.92956900000001 182.92956900000001 182.92956900000001 ZT20-23 320.36539600000003 320.36539600000003 320.36539600000003