Adidas revenues (in millions of €) in the Greater China and Western Europe regions for the years 2011 through 2015 are shown in the accompanying table. Assume revenues are normally distributed.

a. Specify the competing hypotheses in order to test whether the variance in revenues is greater in the Greater China region than in the Western Europe region.

b. Calculate the value of the test statistic.

c. Find the p-value.

d. At α = 0.05, what is your conclusion?

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2013 2011 2012 2014 2015 1776 2449 Greater China 1229 1562 1655 Western Europe 3922 4076 3800 3793 4539