condition mean min max ZT0-3 58.0473 21.56935 79.79814999999999 ZT4-7 26.38925 26.38925 26.38925 ZT8-11 26.5246 26.5246 26.5246 ZT12-15 40.58075 24.343400000000003 56.8181 ZT16-19 72.2824 72.2824 72.2824 ZT20-23 95.02225 95.02225 95.02225