condition mean min max ZT0-3 2202.23 2202.23 2202.23 ZT4-7 2116.04 2116.04 2116.04 ZT8-11 1979.625 1979.625 1979.625 ZT12-15 1742.835 1742.835 1742.835 ZT16-19 1612.7350000000001 1612.7350000000001 1612.7350000000001 ZT20-23 2151.01 2151.01 2151.01