Refer to the Human Development data file on the text CD. Use x = GDP and y = fertility (mean number of children per adult woman).
a. Construct a scatter plot, and indicate whether regression seems appropriate.
b. Find the correlation and the regression equation.
c. With x = percent using contraception, ŷ = 6.7 - 0.065x. Can you compare the slope of this regression equation with the slope of the equation with GDP as a predictor to determine which has the stronger association with y? Explain.
d. Contraception has a correlation of -0.887 with fertility. Which variable has a stronger association with fertility: GDP or contraception?

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