condition mean min max ZT0-3 156.01 156.01 156.01 ZT4-7 117.44999999999999 117.44999999999999 117.44999999999999 ZT8-11 104.5915 104.5915 104.5915 ZT12-15 104.68535 104.68535 104.68535 ZT16-19 136.062 136.062 136.062 ZT20-23 150.44966666666664 150.44966666666664 150.44966666666664