condition mean min max ZT0-3 3.7590250000000003 3.7590250000000003 3.7590250000000003 ZT4-7 4.10571 4.10571 4.10571 ZT8-11 3.88119 3.88119 3.88119 ZT12-15 4.4945 4.4945 4.4945 ZT16-19 6.09846 6.09846 6.09846 ZT20-23 2.8526800000000003 2.8526800000000003 2.8526800000000003