condition mean min max ZT0-3 1179.0500000000002 1179.0500000000002 1179.0500000000002 ZT4-7 1296.2 1296.2 1296.2 ZT8-11 1269.15 1269.15 1269.15 ZT12-15 1871.5 1871.5 1871.5 ZT16-19 1630.4499999999998 1630.4499999999998 1630.4499999999998 ZT20-23 1052.2 1052.2 1052.2