condition mean min max ZT0-3 531.230007 531.230007 531.230007 ZT4-7 167.4428635 167.4428635 167.4428635 ZT8-11 80.30987999999999 80.30987999999999 80.30987999999999 ZT12-15 133.0179225 133.0179225 133.0179225 ZT16-19 197.462826 197.462826 197.462826 ZT20-23 342.406241 342.406241 342.406241