condition mean min max ZT0-3 1121.1999999999998 1121.1999999999998 1121.1999999999998 ZT4-7 1342.9 1342.9 1342.9 ZT8-11 1458.1 1458.1 1458.1 ZT12-15 1670.85 1670.85 1670.85 ZT16-19 1123.9 1123.9 1123.9 ZT20-23 1184.05 1184.05 1184.05