condition mean min max ZT0-3 2441.05 2441.05 2441.05 ZT4-7 3954.2 3954.2 3954.2 ZT8-11 3710.1499999999996 3710.1499999999996 3710.1499999999996 ZT12-15 2702.7 2702.7 2702.7 ZT16-19 1710.0500000000002 1710.0500000000002 1710.0500000000002 ZT20-23 1490.25 1490.25 1490.25