condition mean min max ZT0-3 0.7519925000000001 0.21827950000000002 1.27568 ZT4-7 0.089928 0.089928 0.089928 ZT8-11 0.37826099999999996 0.37826099999999996 0.37826099999999996 ZT12-15 0.43891899999999995 0.2998285 0.5780095 ZT16-19 0.366044 0.366044 0.366044 ZT20-23 0.0995105 0.0995105 0.0995105