condition mean min max ZT0-3 29.9944 29.9944 29.9944 ZT4-7 25.785449999999997 25.785449999999997 25.785449999999997 ZT8-11 24.88245 24.88245 24.88245 ZT12-15 30.220599999999997 30.220599999999997 30.220599999999997 ZT16-19 37.388333333333335 37.388333333333335 37.388333333333335 ZT20-23 32.836999999999996 32.836999999999996 32.836999999999996