condition mean min max ZT0-3 0.6621125 0.5917954999999999 0.6991655 ZT4-7 0.5625225 0.5625225 0.5625225 ZT8-11 0.8626800000000001 0.8626800000000001 0.8626800000000001 ZT12-15 0.7431180000000001 0.6650940000000001 0.821142 ZT16-19 0.506231 0.506231 0.506231 ZT20-23 0.5720625 0.5720625 0.5720625