Homework Problem 18, Due Wednesday April 2.
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Hand in edited R code and (small) portions of results 
showing that you have re-done in R all of the 
calculations and graphics accomplished in SAS in parts 
(a)-(d) of the class-handout which you can find in the
web-page handout BassSAS.txt within the directory

http://www.math.umd.edu/~evs/s798c/Slogs