condition mean min max ZT0-3 187.45 187.45 187.45 ZT4-7 251.1 251.1 251.1 ZT8-11 228.4 228.4 228.4 ZT12-15 160.95 160.95 160.95 ZT16-19 237.7 237.7 237.7 ZT20-23 243.4 243.4 243.4