Introduction to Statistical Methods for the Life and Health Sciences
Instructor: Ivo Dinov, Asst. Prof.
Departments of Statistics & Neurology
HOMEWORK 7 (PROJECT)
Friday, Dec. 07, 2001, turn in after lecture
submission rules. On the front page include the following
(HW_7_1) You have to browse the Los Angeles Department of Water
& Power web page (
and come up with
an interesting project that you need to complete by the deadline.
Here are the basic requirements for your project:
Please submit your project nicely typeset, including text/tables/graphs,
in the form according to our HW assignment policies.
Clearly state the problem you have chosen to investigate, list the
resources you used to come up with the project and reference all sources
you used to complete the project.
Examples of projects could be (but are not restricted to):
Investigate the change of the level of various disinfectants, by-products,
contaminants, chemicals, micro-organisms, pesticides, radioactive contaminants
or other substances which may be added or naturally occurring in
the years (say 1996-2001) in our tap drinking water.
Study the changes and make predictions about the water supply and demand
in the LA county over the years.
Compare various characteristics of the LA water quality/treatment/processing/characterisitcs
with other counties, you may need to browse the water quality reports for
the neighboring counties.
Is our water management efficient? Is it improving or is it getting worse
over the years? How?
Do we use most of the drinking water for drinking?
How do leaks (small or big) effect the price, supply and demand of water?
Does the proportion of households drinking bottled water increase/decrease
Clearly state your hypothesis, prior to interrogating the data from
the tables provided on the DWP website.
Use statistical techniques from the ones we have discussed in Stat 13 to
convey whether or not there is statistical evidence in support of
the differences your project investigates.
Explicitly state your approach to answer your research hypothesis. Write
all formulas/tests/statistics you need.
Interpet your statistical (numerical) results in a lay back language. Make
a recommendation is you find a way to improve water quality, decrease cost,
continue or change the trend you find, or about any other interesting aspect
of the data you have chosen to analyze.
You may want to browse some of the following resource, as well:
\Ivo D. Dinov, Ph.D., Departments of Statistics and Neurology,
UCLA School of Medicine/