Challenge Problem: Verdini and Lagier8 developed an iodimetric titration procedure for determining ascorbic acid in vegetables and fruits. They compared the results of their titration experiments with similar results from an HPLC method (see Chapter 33). The results ofheir comparison are shown in the following table.
Method Comparison*
Sample | HPLC, mg/100 g | Voltammetry, mg/100 g |
1 | 138.6 | 140.0 |
2 | 126.6 | 120.6 |
3 | 138.3 | 140.9 |
4 | 126.2 | 123.7 |
*Ascorbic acid content determined in kiwi fruit samples by means of HPLC with UV detection and voltammetric titration.
(a) Find the mean and standard deviation of each set of data.
(b) Determine whether there is a difference in the variances of the two data sets at the 95% level.
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