condition mean min max ZT0-3 0.5974784666666666 0.30364339999999995 0.8227225 ZT4-7 0.424817 0.424817 0.424817 ZT8-11 0.40328050000000004 0.40328050000000004 0.40328050000000004 ZT12-15 0.8460215 0.751635 0.9404079999999999 ZT16-19 0.41934 0.41934 0.41934 ZT20-23 0.8188565 0.8188565 0.8188565