Examine the regression and scatterplot showing the regression line, 95% confidence intervals, and 95% prediction intervals using 2006 and 2010 energy use (kg oil equivalent per $ 1000 GDP) for a sample of 31 countries first examined in Exercise 54. The response variable is 2010 Energy Use.
a) Explain the meaning of the 95% prediction intervals in this context.
b) Explain the meaning of the 95% confidence intervals in this context. You can see the regression model in Exercise 54. The extraordinary point is Iceland. If we set it aside, the model looks like this
c) How has setting aside Iceland changed the regression model? How is it likely to affect the intervals discussed in a) and b)?

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