Grace Chen
N. Christou
Statistics 132A
January 29, 2008
Statistical Analysis – Divorces and Marriages
1
The two graphs
above show the
number of divorces per US population in the year 2000 (divrate2000). The data set is skewed to
the right, shown by the histogram, probably because a large rate of divorces, .006 or more, is
unlikely. The boxplot shows 2 serious outliers at .0083 and .009. The mean is at .0043 with a
standard deviation of .0019. This means that in the left dense area, out of 1000 people there are
about 4 divorces, and this divorce rate has decreased over the years because in 2005, there were
3.6 divorces per 1000 population. So this distribution shows that out of the 250 people you
know, there
is one
divorced person.
2
0
.02
.04
.06
.08
mrate2000
0
100
200
300
Density
.002
.004
.006
.008
divrate20 0
0
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The variable
mrate2000 shows the
number of
marriages per US
population in the
year 2000. The
histogram shows
that the data is skewed
to the right probably
because a marriage rate
larger than .02 is
very unlikely. The
boxplot shows 3
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 Winter '08
 Christou
 Statistics, Standard Deviation, Mean

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