analytical chemistry

Question 2

Curt is testing two different sample treatments. In order to statistically evaluate the sample processing, these are carried out five times with method 1 and seven times with method 2. All sample processing is carried out on the same process liquid. Below are his results, the hosts in the table below are determined concentration Propranolol (mg/L).

a) Investigate if there is any difference in precision between the methods. Don't forget to remove any outliers.

b) Construct a 95% confidence interval for Propranolol in process fluid. Use measurement data from both methods 1 and 2.

\begin{tabular}{|c|c|} \hline Method 1 & Method 2 \\ \hline 1.0 & 1.7 \\ \hline 0.9 & 0.8 \\ \hline 0.8 & 0.9 \\ \hline 1.1 & 1.2 \\ \hline 1.3 & 1.0 \\ \hline & 0.9 \\ \hline & 0.9 \\ \hline \end{tabular}