condition mean min max ZT0-3 223.65 223.65 223.65 ZT4-7 228.3 228.3 228.3 ZT8-11 180.64999999999998 180.64999999999998 180.64999999999998 ZT12-15 211.60000000000002 211.60000000000002 211.60000000000002 ZT16-19 227.05 227.05 227.05 ZT20-23 179.3 179.3 179.3