condition mean min max ZT0-3 8827.75 8827.75 8827.75 ZT4-7 15784.5 15784.5 15784.5 ZT8-11 15303.7 15303.7 15303.7 ZT12-15 13704.5 13704.5 13704.5 ZT16-19 10583.4 10583.4 10583.4 ZT20-23 6848.45 6848.45 6848.45