condition mean min max ZT0-3 13.136015053500001 3.266866007 23.005164100000002 ZT4-7 2.58586664875 0.9170467929999999 4.2546865045 ZT8-11 27.94263449575 21.102206016500002 34.783062975 ZT12-15 71.9873817775 69.316653485 74.65811007 ZT16-19 55.1533254175 52.788448025 57.51820281 ZT20-23 75.90632323 64.481305805 87.33134065499999