Question

A food company testing a new method for the analysis of the polyunsaturated fat content of various vegetable and animal oils obtained the results in the table for the old and new methods. Use a paired Student's t-test to determine if the new and old analysis procedures are giving the same results at the 95% confidence level. You can assume that the precision is approximately the same for these two methods. Critical t values at various confidence intervals and degrees of freedom can be found in the Student's 1 table. 4.9 Polyunsaturated fat (% w/w of total fat) Sample Old New Number Method Method 1 5.5 2 35.8 34.5 3 6.0 5.8 4 63.4 60.5 5 17.5 15.9 6 9.7 8.2 7 48.2 45.5 27.0 22.4 8 calculated critical Are the results the same at the 95% confidence level? no o O yes