condition mean min max ZT0-3 0.4540755 0.4540755 0.4540755 ZT4-7 1.89591 1.89591 1.89591 ZT8-11 3.3490200000000003 3.3490200000000003 3.3490200000000003 ZT12-15 4.06898 4.06898 4.06898 ZT16-19 1.63973 1.63973 1.63973 ZT20-23 2.17677 2.17677 2.17677