condition mean min max ZT0-3 22.3215 22.3215 22.3215 ZT4-7 12.84645 12.84645 12.84645 ZT8-11 17.0744 17.0744 17.0744 ZT12-15 38.8797 38.8797 38.8797 ZT16-19 48.2132 48.2132 48.2132 ZT20-23 41.8746 41.8746 41.8746