STAT 599 Spring 2013 Homework 4
--------------------------------

1.  Do problem 3 given on page 181 of the book.

2.  Do problem 4 given on page 181-182 of the book.

3.  Do problem 8 given on page 182 of the book.  [This will be "extra credit"
for the HW 4 assignment since we may not get all the way through multilevel
models by that time, but is good practice before Test 2.]

 
NOTE:  Examine all relevant aspects of model building that we have 
discussed in class, such a goodness-of-fit, model diagnostics, etc.
For each problem, write a couple of paragraphs summarizing your model and 
your validation of it.

*** For these problems, you will have to load the 
'faraway' package in R to access the data sets.  If you have never
installed it, type
install.packages("faraway")
and follow the directions.

To load the package (and the MASS and lme4 packages) for use in an R session, type
library(faraway); library(MASS); library(lme4)

Make sure you have installed the 'lme4' package from the internet first.

Then you can type
help(eggprod)
and
help(lawn)
and 
help(jsp)

for details on these data sets.