Question

(e Give one suggestion to improve the (G) accuracy and (ii) the precision of the titration analysis. 3. A new analytical method is developed to measure the mercury concentration in sewage produced by an industrial factory. The results (ppm) are compared with the traditional method and are shown below: Sample New method 80.11 79.70 80.44 80.72 79.24 79.66 Traditional method 79.80 80.02 82.33 79.91 81.97 82.60 3 4 (a) Determine whether the 2 methods give thesameresults at 90% confidence level. (b) The scientist who invented the new analytical method claims that the new method is more c) Define the population mean μ stand deviation (o) and sample mean (x), stand deviation (s). In n that the sample standard deviation of the mercury concentration in the new method is a precise than the traditional method at 95% confidence level. Is his claim correct? what way the s can be a good estimate of σ? good estimate of σ calculate the 95% confidence interval of the traditional method. What is the (d) Give statistical meaning of the calculated results?

Answer 1