condition mean min max ZT0-3 41.111850000000004 41.111850000000004 41.111850000000004 ZT4-7 32.538700000000006 32.538700000000006 32.538700000000006 ZT8-11 29.6288 29.6288 29.6288 ZT12-15 30.542 30.542 30.542 ZT16-19 38.033950000000004 38.033950000000004 38.033950000000004 ZT20-23 39.89325 39.89325 39.89325