condition mean min max ZT0-3 80.583021 80.583021 80.583021 ZT4-7 137.07169 137.07169 137.07169 ZT8-11 132.0314295 132.0314295 132.0314295 ZT12-15 162.789222 162.789222 162.789222 ZT16-19 135.919587 135.919587 135.919587 ZT20-23 109.8571015 109.8571015 109.8571015