10.

The Kyoto Protocol was signed in 1997, and required countries to start reducing their carbon emissions protocol became enforceable in February 2005. In 2004, the mean CO2 emission was 4.87 metric tons capita. In 2010, the CO2 emissions for a random sample of 30 countries were collected. Is there enough evidence to show that the mean CO2 emission is lower in 2010 than in 2004? State the random variable population parameter, and hypotheses. a) The symbol for the random variable involved in this problem is * v The wording for the random variable in context is as follows: the carbon emissions of a randomly selected country in 2010 O a randomly selected country in 2010 the mean carbon emissions of all countries in 2010 the mean carbon emissions of 30 randomly selected countries in 2810 O 30 randomly selected countries in 2010 c) Fill in the correct null and alternative hypotheses: Ho : UV V HA: