condition mean min max ZT0-3 22.006375 16.46615 27.5466 ZT4-7 19.75255 19.75255 19.75255 ZT8-11 79.2502 79.2502 79.2502 ZT12-15 0 0 0 ZT16-19 52.32875 52.32875 52.32875 ZT20-23 39.5471 39.5471 39.5471