condition mean min max ZT0-3 170.924364 170.924364 170.924364 ZT4-7 190.49008350000003 190.49008350000003 190.49008350000003 ZT8-11 202.92819300000002 202.92819300000002 202.92819300000002 ZT12-15 223.16162350000002 223.16162350000002 223.16162350000002 ZT16-19 210.58508799999998 210.58508799999998 210.58508799999998 ZT20-23 236.877304 236.877304 236.877304