Four analysts perform replicate sets of Hg determinations
on the same analytical sample. The results in ppb Hg are
shown in the following table:

(a) State the appropriate hypotheses.
(b) Do the analysts differ at the 95% confidence level? At the 99% confidence level (Fσit 5 5.95) At the 99.9% confidence level (Fσit 5 10.80)
(c) Which analysts differ from each other at the 95% confidence level?

Determination Analys Analyst 2 Analyst 3 Analyst 4 10.24 10.26 10.29 10.23 10.14 10.12 10.04 10.07 10.19 10.11 10.15 10.12 10.19 10.15 10.16 10.10