condition mean min max ZT0-3 14.923845 14.923845 14.923845 ZT4-7 14.584641999999999 14.584641999999999 14.584641999999999 ZT8-11 14.149112500000001 14.149112500000001 14.149112500000001 ZT12-15 10.303062 10.303062 10.303062 ZT16-19 13.1945845 13.1945845 13.1945845 ZT20-23 12.9391995 12.9391995 12.9391995