condition mean min max ZT0-3 206.146975 162.27945 250.0145 ZT4-7 14.75853 14.75853 14.75853 ZT8-11 8.32953 8.32953 8.32953 ZT12-15 0 0 0 ZT16-19 51.1392 51.1392 51.1392 ZT20-23 57.396950000000004 57.396950000000004 57.396950000000004