condition mean min max ZT0-3 1005.5 1005.5 1005.5 ZT4-7 1277.1 1277.1 1277.1 ZT8-11 1183.1999999999998 1183.1999999999998 1183.1999999999998 ZT12-15 1148.65 1148.65 1148.65 ZT16-19 1213.75 1213.75 1213.75 ZT20-23 1136.9 1136.9 1136.9