condition mean min max ZT0-3 2340.15 2340.15 2340.15 ZT4-7 2629.2 2629.2 2629.2 ZT8-11 2753.6000000000004 2753.6000000000004 2753.6000000000004 ZT12-15 2219.3999999999996 2219.3999999999996 2219.3999999999996 ZT16-19 2104.8 2104.8 2104.8 ZT20-23 2167.3999999999996 2167.3999999999996 2167.3999999999996