condition mean min max ZT0-3 586.85 586.85 586.85 ZT4-7 580.4 580.4 580.4 ZT8-11 511.5 511.5 511.5 ZT12-15 509.4 509.4 509.4 ZT16-19 490.3 490.3 490.3 ZT20-23 549.7 549.7 549.7