condition mean min max ZT0-3 39.64375 33.3559 45.9316 ZT4-7 23.8841 23.8841 23.8841 ZT8-11 36.2551 36.2551 36.2551 ZT12-15 0 0 0 ZT16-19 47.0383 47.0383 47.0383 ZT20-23 41.241 41.241 41.241