Homework 7, Due Friday October 2.
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Hand in the R code along with the graphs for the following 
two exercises.

(I) At the URL

http://www.math.umd.edu/~evs/s430.old/Data/cathedrals

you can find a dataset of Heights and Lengths (in feet) of 9
Romanesque and 16 Gothic style cathedrals in England.

Plot and caption a graph showing Height plotted against 
length, with a different plotting character for Romanesque and 
for Gothic. Include a Legend box and plot a broken-line graph (with 
different line types for the two styles of cathedral) of the 
Height vs Length relationship for the two types.


(II) Simulate a dataset of size 1600 from the Gamma distribution with
shape parameter 3.5 and scale parameter 1.  After choosing a
reasonable upper bound (not necessarily the maximum value for the
data, plot a histogram with 40 class intervals, on probability scale,
appropriately captioned and titled, and overlay the plotted density
curve for the simulated distribution.