condition mean min max ZT0-3 2625.6000000000004 2625.6000000000004 2625.6000000000004 ZT4-7 2579.3 2579.3 2579.3 ZT8-11 2366.1 2366.1 2366.1 ZT12-15 2234.0 2234.0 2234.0 ZT16-19 2935.9 2935.9 2935.9 ZT20-23 2840.35 2840.35 2840.35