condition mean min max ZT0-3 2581.2 2581.2 2581.2 ZT4-7 2810.5 2810.5 2810.5 ZT8-11 3138.35 3138.35 3138.35 ZT12-15 3362.55 3362.55 3362.55 ZT16-19 2999.6 2999.6 2999.6 ZT20-23 2876.0 2876.0 2876.0