Q5(d). F-test and t-test: voltammetry versus FIA
Determination of a vitamin in a food sample was carried out by a routine voltammetric method and by flow injection analysis (FIA) [results given in the paper]. Compare the precision of the two methods by an F-test at α = 0.05, and decide by an appropriate t-test whether the different results of the two methods are significant at α = 0.05.
Model answer
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CoversF-testt-testcomparison of methodsstatistics in analysis
All parts of Question 5
- 5(a) Al and Mg from ignition of their oxinates5 marks
- 5(b) Spectrophotometry of one- and two-component samples10 marks
- 5(c) Balancing MnO₄⁻ + VO²⁺ in acid5 marks
- 5(d) F-test and t-test: voltammetry versus FIA10 marks