condition mean min max ZT0-3 443.2 443.2 443.2 ZT4-7 586.5 586.5 586.5 ZT8-11 582.85 582.85 582.85 ZT12-15 644.4 644.4 644.4 ZT16-19 618.15 618.15 618.15 ZT20-23 542.8 542.8 542.8