condition mean min max ZT0-3 33.19735 33.19735 33.19735 ZT4-7 37.093 37.093 37.093 ZT8-11 45.8677 45.8677 45.8677 ZT12-15 29.9056 29.9056 29.9056 ZT16-19 39.50175 39.50175 39.50175 ZT20-23 28.7444 28.7444 28.7444