Question: An example in Chapter 4 compared R&D expenditure in Britain and Germany. The sample data were: x 1 = 3.7 x 2 = 4.2 s

An example in Chapter 4 compared R&D expenditure in Britain and Germany. The sample data were:

x̅₁ = 3.7 x̅₂ = 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?

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