Since only the linearity of the two intensities is of interest, the unit time conversion is ignored and only the integration are concerned.
For large Al scatterer, \(I\ \left(trans\right)\) is determined to be 85314 and \(I (incident)\) is determined to be 221824. The uncertainties of each values are the standard deviation, 1235 and 513 respectively. Therefore, \(d\ =\ 4.34\ cm\) and the percentage uncertainty is