condition mean min max ZT0-3 7.45269 1.78463 12.101054999999999 ZT4-7 1.2652465 1.2652465 1.2652465 ZT8-11 2.59929 2.59929 2.59929 ZT12-15 1.7661125 1.72965 1.802575 ZT16-19 6.11641 6.11641 6.11641 ZT20-23 10.74755 10.74755 10.74755