condition mean min max ZT0-3 873.7535 873.7535 873.7535 ZT4-7 762.179 762.179 762.179 ZT8-11 665.8615 665.8615 665.8615 ZT12-15 670.4475 670.4475 670.4475 ZT16-19 827.9024999999999 827.9024999999999 827.9024999999999 ZT20-23 913.742 913.742 913.742