condition mean min max ZT0-3 1.0654405 1.0654405 1.0654405 ZT4-7 0.787588 0.787588 0.787588 ZT8-11 0.394034 0.394034 0.394034 ZT12-15 0.5363205 0.5363205 0.5363205 ZT16-19 2.2943350000000002 2.2943350000000002 2.2943350000000002 ZT20-23 1.14144 1.14144 1.14144