- Can You Kindly Answer All Questions And Number Each Question Accordingly This Module Is Analytical Chemistry 1 (144.14 KiB) Viewed 62 times
Can you kindly answer all questions and number each question accordingly. this module is analytical chemistry.
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Can you kindly answer all questions and number each question accordingly. this module is analytical chemistry.
Can you kindly answer all questions and number each question accordingly. this module is analytical chemistry.
Section A Question 1 35 Marks Consider the following sets of replicate measurements. Replicates A B 1 2.7 3.5 2 3.0 3.1 3 2.0 3.2 4 2.8 3.9 5 2.6 3.1 6 2.8 3.3 7 2.9 3.0 a. C. 1.1 Calculate for each of the data sets (Express your answers with three significant figures): The mean (3 Marks) b. The standard deviation (3 Marks) The 95% confidence interval for each set of data. (6 Marks) 1.2 From the data set A and B, identify the values that can reasonably be suspected as outliers. Prove by statistical mean that the suspected values can be rejected or not at 99% level of confidence (6 Marks) 1.3 Assess separately the precision of the two data sets and conclude. The measurement requirement is 5% of the relative standard deviation. Consider the outcome of question 1.2 when answering this question. (6 Marks) 1.4 Assess the accuracy of the two data sets using the student t-test at 95% confidence level. The true values of these measurements are 2,70 and 3,15 for the data sets A and B respectively. Consider the outcome of question 1.2 when answering this question. 1.5 Demonstrate using the paired t-test from the MS Excel, whether there is a significant difference between the data sets A and B or not. The confidence level of this test is 95%. Consider the outcome of question 1.2 when answering this question. (6 Marks) 1.6 Compare the precision of measurements A and B by using the appropriate statistical test and interpret the result. The confidence level for this test is 95%. (5 Marks) [Subtotal: 35 Marks]
Section A Question 1 35 Marks Consider the following sets of replicate measurements. Replicates A B 1 2.7 3.5 2 3.0 3.1 3 2.0 3.2 4 2.8 3.9 5 2.6 3.1 6 2.8 3.3 7 2.9 3.0 a. C. 1.1 Calculate for each of the data sets (Express your answers with three significant figures): The mean (3 Marks) b. The standard deviation (3 Marks) The 95% confidence interval for each set of data. (6 Marks) 1.2 From the data set A and B, identify the values that can reasonably be suspected as outliers. Prove by statistical mean that the suspected values can be rejected or not at 99% level of confidence (6 Marks) 1.3 Assess separately the precision of the two data sets and conclude. The measurement requirement is 5% of the relative standard deviation. Consider the outcome of question 1.2 when answering this question. (6 Marks) 1.4 Assess the accuracy of the two data sets using the student t-test at 95% confidence level. The true values of these measurements are 2,70 and 3,15 for the data sets A and B respectively. Consider the outcome of question 1.2 when answering this question. 1.5 Demonstrate using the paired t-test from the MS Excel, whether there is a significant difference between the data sets A and B or not. The confidence level of this test is 95%. Consider the outcome of question 1.2 when answering this question. (6 Marks) 1.6 Compare the precision of measurements A and B by using the appropriate statistical test and interpret the result. The confidence level for this test is 95%. (5 Marks) [Subtotal: 35 Marks]