Since its first season in 1950, the FIA Formula One World Championship has become one of the most popular championships of single-seated auto racing. The file F1Prices2018 contains data about average ticket prices for 21 Grand Prix races.

a. At the 0.05 level of significance, is there a difference in the variance of average ticket prices in Europe and the rest of the world?

b. Using the results of (a), which \(t\) test is appropriate for comparing mean ticket prices in Europe and the rest of the world?

c. At the 0.05 level of significance, conduct the test selected in (b).

d. Write a short summary of your findings.