condition mean min max ZT0-3 0.9805302500000002 0.7577405 1.2033200000000002 ZT4-7 3.454135 3.454135 3.454135 ZT8-11 10.497225 10.497225 10.497225 ZT12-15 0 0 0 ZT16-19 5.710635 5.710635 5.710635 ZT20-23 2.24779 2.24779 2.24779