The CO 2 emissions in metric tons for selected countries are shown for selected years. At α

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The CO2emissions in metric tons for selected countries are shown for selected years. At α = 0.10, is there a difference in the means for the selected years?

1990 1980 2000 2010 291.2 578.6 991.0 564.6 202.1 468.7 131.7 321.5 290.5 613.6 470.6 451.0 235.0 302.2 560.3 414.5 198.

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