condition mean min max ZT0-3 55.10263 55.10263 55.10263 ZT4-7 69.283411 69.283411 69.283411 ZT8-11 71.95374749999999 71.95374749999999 71.95374749999999 ZT12-15 50.581852 50.581852 50.581852 ZT16-19 61.279728500000004 61.279728500000004 61.279728500000004 ZT20-23 67.70767000000001 67.70767000000001 67.70767000000001