condition mean min max ZT0-3 11.6561625 11.012325 12.3 ZT4-7 25.8248 25.8248 25.8248 ZT8-11 19.0002 19.0002 19.0002 ZT12-15 0 0 0 ZT16-19 14.5549 14.5549 14.5549 ZT20-23 15.462599999999998 15.462599999999998 15.462599999999998