Question

1.) 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. Table 7.3.3 contains a random sample of CO2 emissions in 2010 ("CO2 emissions," 2013). Is there enough evidence to show that the mean CO2 emission is lower in 2010 than in 2004? Test at the 1% level. Table #7.3.3: CO2 Emissions (in metric tons per capita) in 2010 | 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

solution Here Ho - M = 4.87 VS H ML 4.87 from the given data n=25 X= 3.455 = 2.968 3.455-no -2.384 Test statistic t = 3 = 2.968/525 de f = n-1=25-1=2u, At L=14. =0.01 Critical value = - 2.492 here cal t = -2.384 -2.492, so do not reject to There is not sufficient evidence to support the mean co2 emisson es lower in 2010.