$ ministat -A -c 99 before_unix after_unixx before_unix+ after_unix N Min Max Median Avg Stddevx 10 11.322 11.529 11.401 11.4127 0.062467858+ 10 11.249 11.469 11.3515 11.368 0.078689262No difference proven at 99.0% confidence---snap---