Are gasoline prices a potential policy tool in controlling carbon emissions? The table below shows 2001 gasoline prices (dollars per liter) and carbon dioxide emissions per dollar of GDP. Research question: At α = .05, based on these data, is there a significant rank correlation between these two variables? Only the first 3 and last 3 observations are shown.

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Gasoline Prices and Carbon Emissions for Selected Nations (n 31) CO/GDP (kg/S) 0.79 0.25 0.37 Nation Gas Price (S/L) Australia Austria Belgium 0.489 0.888 0.984 Turkey United Kingdom United States 1.003 1.165 0.381 0.99 0.41 0.63