condition mean min max ZT0-3 2533.3 2533.3 2533.3 ZT4-7 2756.9 2756.9 2756.9 ZT8-11 2801.65 2801.65 2801.65 ZT12-15 2586.3 2586.3 2586.3 ZT16-19 2906.45 2906.45 2906.45 ZT20-23 2879.35 2879.35 2879.35