condition mean min max ZT0-3 940.5882896 436.1906302 1444.9859490000001 ZT4-7 177.090757225 170.4124051 183.76910935 ZT8-11 400.43687320000004 292.6809718 508.1927746 ZT12-15 353.268261175 257.02130365 449.5152187 ZT16-19 223.2290986 198.43496955 248.02322765 ZT20-23 135.254209925 120.0118014 150.49661845