SECTION B Answer ONE question from this section. 6. Answer ALL parts. A chemist used an...
SECTION B Answer ONE question from this section. 6. Answer ALL parts. A chemist used an analytical method to determine the amount of suspended solids in effluents from six different samples. Their data (in g) are presented in the following table: Mass/ 53.4 55.1 52.1 54.5 58.0 56.8 (a) Calculate the mean, mode and median for the mass measurements. (3 marks) (b) Calculate the standard deviation and relative standard deviation for this mass dataset. (6 marks) Calculate the minimum error in the above measurements. How would this minimum error change if the mass was measured to 4 decimal places (e.g., 53.4000, 55.1000, etc.)? (3 marks) Use a Q-test to identify whether the 58.0 g value in the table above is an outlier in the data that can be rejected with a confidence greater than 90%: (3 marks) No. of Replicate Measurements Reject with 99% confidence Reject with 90% Confidence 0.941 0.765 0.642 0.560 0.507 Reject with 95% Confidence 0.970 0.829 0.710 0.625 0.568 4 5 0.994 0.926 0.821 0.740 0.680 (Total 15 marks)