condition mean min max ZT0-3 69.44635 69.44635 69.44635 ZT4-7 54.42744999999999 54.42744999999999 54.42744999999999 ZT8-11 53.1331 53.1331 53.1331 ZT12-15 53.25965 53.25965 53.25965 ZT16-19 76.2929 76.2929 76.2929 ZT20-23 62.010099999999994 62.010099999999994 62.010099999999994