condition mean min max ZT0-3 2216.25 2216.25 2216.25 ZT4-7 2733.2 2733.2 2733.2 ZT8-11 2581.6 2581.6 2581.6 ZT12-15 2950.8999999999996 2950.8999999999996 2950.8999999999996 ZT16-19 2735.3500000000004 2735.3500000000004 2735.3500000000004 ZT20-23 2276.35 2276.35 2276.35