condition mean min max ZT0-3 42.137221 42.137221 42.137221 ZT4-7 92.613162 92.613162 92.613162 ZT8-11 86.3751275 86.3751275 86.3751275 ZT12-15 116.07799399999999 116.07799399999999 116.07799399999999 ZT16-19 88.822135 88.822135 88.822135 ZT20-23 76.0092905 76.0092905 76.0092905