condition mean min max ZT0-3 1.4892132500000002 1.2777500000000002 1.7006765000000001 ZT4-7 28.09615 28.09615 28.09615 ZT8-11 57.62015 57.62015 57.62015 ZT12-15 0 0 0 ZT16-19 25.89985 25.89985 25.89985 ZT20-23 9.511064999999999 9.511064999999999 9.511064999999999