condition mean min max ZT0-3 62.196031 62.196031 62.196031 ZT4-7 88.7463695 88.7463695 88.7463695 ZT8-11 81.1848005 81.1848005 81.1848005 ZT12-15 79.262046 79.262046 79.262046 ZT16-19 77.28778199999999 77.28778199999999 77.28778199999999 ZT20-23 73.53404499999999 73.53404499999999 73.53404499999999