condition mean min max ZT0-3 0.5718318735000001 0.38823694 0.7554268070000001 ZT4-7 2.14242153375 1.447846721 2.8369963465 ZT8-11 2.76004993425 2.3352252725 3.1848745960000002 ZT12-15 2.4393320415 2.4299913045 2.4486727784999998 ZT16-19 3.5107364097500002 2.6113009345 4.4101718850000005 ZT20-23 10.57601237075 8.102581591500002 13.04944315