condition mean min max ZT0-3 32.39705 21.341450000000002 39.345299999999995 ZT4-7 19.4391 19.4391 19.4391 ZT8-11 28.53135 28.53135 28.53135 ZT12-15 47.641600000000004 45.013850000000005 50.26935 ZT16-19 48.0649 48.0649 48.0649 ZT20-23 47.715050000000005 47.715050000000005 47.715050000000005