condition mean min max ZT0-3 658.951 658.951 658.951 ZT4-7 644.6775 644.6775 644.6775 ZT8-11 490.9745 490.9745 490.9745 ZT12-15 424.475 424.475 424.475 ZT16-19 629.798 629.798 629.798 ZT20-23 636.168 636.168 636.168