condition mean min max ZT0-3 13.94712 4.856870000000001 29.901699999999998 ZT4-7 61.04595 61.04595 61.04595 ZT8-11 31.99215 31.99215 31.99215 ZT12-15 38.984525000000005 29.58885 48.3802 ZT16-19 42.30485 42.30485 42.30485 ZT20-23 15.7614 15.7614 15.7614