For each question what is the answer?

a. paired t-test

b. f-test

c. t-test (comparisom mean with true value

d. t-test (comparison of two means)

Match the statement with the correct statistical test to determine whether there is any significant difference in the developed method. The standard reference material is certified to contain 94.6 ppm of an organic pesticide in soil. Your analysis gives the value of 99.3, 92.5, 96.2, and 93,6 ppm. The significant difference was tested at 95% confidence level. Choose... A microwave-assisted extraction procedure to digest soil samples for the determination of mercury was being developed. Several reagents were tested for digesting the samples. Results obtained with two types of acid mixtures used are given in the table below (in ng Hg per gram of sample). Acid mixture 1 Acid mixture 2 Choose... 161 159 164 144 165 143 155 Determine if there is a significant difference between the results of these methods A new method has been reported for determining the weight percent of Fe in some samples. To test the method, four samples containing known amounts of Fe were prepared and analyzed. The result as % (w/w) Fe are given below: Sample Old method New method 1 6.4 6.6 Choose... 2 10.2 10.6 3 20.1 19.7 4 40.4 40.6 Determine if there is a significant difference in the variance between the two methods. A procedure for determining the weight percent of an impurity (Y) in complex clay minerals was reported. To test the method, five samples containing known amounts of Y were analyzed. The result as % (w/w) Y is given below: Sample Actual New method Choose... 11 5.0 6.6 2 10.0 11.5 3 20.0 19.7 4 40.0 40.6 5 60.0 53.7 Determine the accuracy of the new method