condition mean min max ZT0-3 85.17903 85.17903 85.17903 ZT4-7 104.6588405 104.6588405 104.6588405 ZT8-11 106.8615525 106.8615525 106.8615525 ZT12-15 111.7311885 111.7311885 111.7311885 ZT16-19 101.10830250000001 101.10830250000001 101.10830250000001 ZT20-23 101.116687 101.116687 101.116687