condition mean min max ZT0-3 37.605877 37.605877 37.605877 ZT4-7 36.1771205 36.1771205 36.1771205 ZT8-11 31.4993965 31.4993965 31.4993965 ZT12-15 43.3491135 43.3491135 43.3491135 ZT16-19 83.5161425 83.5161425 83.5161425 ZT20-23 103.90402599999999 103.90402599999999 103.90402599999999