condition mean min max ZT0-3 145.256845 145.256845 145.256845 ZT4-7 154.79135200000002 154.79135200000002 154.79135200000002 ZT8-11 180.0325635 180.0325635 180.0325635 ZT12-15 151.6230295 151.6230295 151.6230295 ZT16-19 116.66407900000002 116.66407900000002 116.66407900000002 ZT20-23 104.577756 104.577756 104.577756