6.12 An example in Chapter 4 compared R&D expenditure in Britain and Germany. The sample data were e1 = 3.7 e2 = 4.2 s1 = 0.6 s2 = 0.9 n1 = 20 n2 = 15 Is there evidence, at the 5% significance level, of difference in the variances of R&D expenditure between the two countries? What are the implications, if any, for the test carried out on the difference of the two means, in Chapter 4?