condition mean min max ZT0-3 76.039825 74.72285 77.35679999999999 ZT4-7 180.86 180.86 180.86 ZT8-11 146.65800000000002 146.65800000000002 146.65800000000002 ZT12-15 0 0 0 ZT16-19 63.53935 63.53935 63.53935 ZT20-23 84.69845000000001 84.69845000000001 84.69845000000001