According to values from Table 3.9, for the nations in the European Union (EU) excluding Luxembourg, carbon dioxide emissions (metric tons per capita) had a mean of 7.4 and standard deviation of 1.7.

(a) How many standard deviations above the mean was the value of 20.9 for Luxembourg?

(b) Sweden’s observation was 5.5.Howmany standard deviations below the mean was it?

(c) The carbon dioxide emissions were 14.1 for Canada and 17.0 for the United States Relative to the distribution for the European Union, find and interpret the z-score for

(i) Canada, (ii) the United States.