condition mean min max ZT0-3 1.70954 1.23384 2.218065 ZT4-7 0.852198 0.852198 0.852198 ZT8-11 0.6068020000000001 0.6068020000000001 0.6068020000000001 ZT12-15 0.635202 0.4066765 0.8637275 ZT16-19 0.44125 0.44125 0.44125 ZT20-23 0.8063739999999999 0.8063739999999999 0.8063739999999999