condition mean min max ZT0-3 3092.1000000000004 3092.1000000000004 3092.1000000000004 ZT4-7 3139.8 3139.8 3139.8 ZT8-11 2948.75 2948.75 2948.75 ZT12-15 3419.8 3419.8 3419.8 ZT16-19 3345.15 3345.15 3345.15 ZT20-23 3338.6000000000004 3338.6000000000004 3338.6000000000004