condition mean min max ZT0-3 0.354572566 0.264246645 0.444898487 ZT4-7 0.38926944925 0.2002640215 0.578274877 ZT8-11 0.880495981 0.8187480540000001 0.942243908 ZT12-15 0.573124001 0.4145437945 0.7317042075 ZT16-19 0.50476518725 0.4930756235 0.5164547509999999 ZT20-23 0.9583027595 0.715643405 1.200962114