condition mean min max ZT0-3 268.7318333333333 252.6895 281.6885 ZT4-7 265.1795 265.1795 265.1795 ZT8-11 260.1995 260.1995 260.1995 ZT12-15 360.09799999999996 340.99649999999997 379.1995 ZT16-19 375.903 375.903 375.903 ZT20-23 291.76800000000003 291.76800000000003 291.76800000000003