condition mean min max ZT0-3 1206.5 1206.5 1206.5 ZT4-7 1177.8 1177.8 1177.8 ZT8-11 1174.3000000000002 1174.3000000000002 1174.3000000000002 ZT12-15 1077.8 1077.8 1077.8 ZT16-19 1098.4 1098.4 1098.4 ZT20-23 1277.0500000000002 1277.0500000000002 1277.0500000000002