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Fuel Consumption and Cars New vans sold in the European Union in 2017 are targeted to have an…

Fuel Consumption and Cars New vans sold in the European Union in 2017 are targeted to have an emission rate of 175 g CO2/km. By 2020 the manufacturers will have to reduce emissions even further.21 A random sample of new vans sold in Germany and Denmark was obtained, and the CO2 emission rate was measured for each.

a. Use the Wilcoxon signed-rank test to determine whether there is any evidence that the median CO2 emission rate for new vans in Germany is greater than 175 g. Use a = 0.01.

b. Use the Wilcoxon signed-rank test to determine whether there is any evidence that the median CO2 emission rate for new vans in Denmark is greater than 175 g. Use a = 0.01.

c. Use the Wilcoxon rank-sum test to compare the population median CO2 emission rates in Germany and Denmark.

d. Summarize your results and each country’s progress toward the 2017 target emission rate.