condition mean min max ZT0-3 2658.19557525 2568.3114305 2748.0797199999997 ZT4-7 2175.2189275 2084.568257 2265.8695979999998 ZT8-11 1959.211505 1948.857324 1969.565686 ZT12-15 3641.04948225 2846.0512360000002 4436.0477285 ZT16-19 4019.637881 3824.4129315 4214.8628305 ZT20-23 2906.8571337500002 2665.552966 3148.1613015000003