Question

7. The Kyoto Protocol was signed in 1997, and required countries to start reducing their carbon emissions. The protocol became enforceable in February 2005. In 2004, the mean CO₂ emission was 4.87 metric tons per capita. The data below are a random sample of CO₂ emissions in 2010. Is there enough evidence to show that the mean CO₂ emission is lower in 2010 than in 2004? Test at the 1% level.

1.36	1.42		5.93	5.36		0.06	9.11		7.32
7.93	6.72		0.78	1.80		0.20	2.27		0.28
5.86	3.46		1.46	0.14		2.62	0.79		7.48
0.86		7.84			2.87			2.45

Answer 1

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