A Particular Additive Is Claimed to Increase the Fuel Efficiency

question 20

Multiple Choice

A particular additive is claimed to increase the fuel efficiency of hybrid vehicles. Eight hybrid cars are used to determine if there is a difference in fuel efficiency (l/100km) with and without the additive. The appropriate nonparametric method to use for these data is the

• A) Kruskal-Wallis test.
• B) Kendall's tau test.
• C) Wilcoxon signed-rank test.
• D) Wilcoxon rank-sum test.
• E) Spearman's rho test.

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