condition mean min max ZT0-3 29.198333333333334 26.1902 33.43925 ZT4-7 28.0387 28.0387 28.0387 ZT8-11 32.98115 32.98115 32.98115 ZT12-15 39.944500000000005 39.57035 40.318650000000005 ZT16-19 30.01335 30.01335 30.01335 ZT20-23 25.78765 25.78765 25.78765