condition mean min max ZT0-3 14.2507 14.2507 14.2507 ZT4-7 12.0195 12.0195 12.0195 ZT8-11 14.294 14.294 14.294 ZT12-15 12.70665 12.70665 12.70665 ZT16-19 17.01615 17.01615 17.01615 ZT20-23 14.9588 14.9588 14.9588