condition mean min max ZT0-3 3.01947 3.01947 3.01947 ZT4-7 1.84078 1.84078 1.84078 ZT8-11 0.8183225000000001 0.8183225000000001 0.8183225000000001 ZT12-15 1.1902865 1.1902865 1.1902865 ZT16-19 4.92073 4.92073 4.92073 ZT20-23 3.177995 3.177995 3.177995