condition mean min max ZT0-3 1618.7 1618.7 1618.7 ZT4-7 1876.1 1876.1 1876.1 ZT8-11 2213.4 2213.4 2213.4 ZT12-15 2108.95 2108.95 2108.95 ZT16-19 2053.3 2053.3 2053.3 ZT20-23 1850.8 1850.8 1850.8