Problem 1

Describe UN11 data in the alr4 package in your own words. You can get details using ?UN11 and googling things. Provide descriptive statistics and plots with your description.

Problem 2

Using the UN11 data set in the alr4 package:

1. Fit a simple linear regression of y = log(fertility) on x=pctUrban.
2. Provide the equation for the fitted model.
3. Use the model fit in a. to provide an interpretation of the association between pctUrban and fertility in the context of the problem.

Problem 3

Fit the regression of y = log(fertility) on x₁ = log(ppgdp) and x₂ = lifeExpF.

1

1. What is the equation for the fitted model?
2. If we increase ppgdp by 25%, what is the expected decrease in fertility?
3. Using your computation from part b (i.e., for a 25% increase in ppgdp), provide an interpretation of the association between ppgdp and fertility in the context of the problem.