condition mean min max ZT0-3 57.8688 57.8688 57.8688 ZT4-7 42.97265 42.97265 42.97265 ZT8-11 37.97755 37.97755 37.97755 ZT12-15 34.41775 34.41775 34.41775 ZT16-19 50.746449999999996 50.746449999999996 50.746449999999996 ZT20-23 60.0501 60.0501 60.0501