condition mean min max ZT0-3 41.006233333333334 32.598150000000004 45.5581 ZT4-7 18.725 18.725 18.725 ZT8-11 17.2802 17.2802 17.2802 ZT12-15 30.9169 30.02795 31.80585 ZT16-19 23.67805 23.67805 23.67805 ZT20-23 40.6189 40.6189 40.6189