condition mean min max ZT0-3 62.608123385 59.17213149 66.04411528 ZT4-7 65.10923292333334 64.31105894333334 65.90740690333334 ZT8-11 67.71260235 66.18232325333334 69.24288144666667 ZT12-15 70.31411137500001 69.63954268666667 70.98868006333333 ZT16-19 75.515184145 75.04614372 75.98422457000001 ZT20-23 76.65417373 74.00114104 79.30720642