Math
131 Projects 1-4 Each project is worth 2.5% of your final
grade. CSUDH

**Elementary
Statistics and Probability ** Dr. Sally Moite

Format
for projects

Title, your name and the text of the
report on the first page (no title page).

No more than two pages, typed double
spaced. *No less than two paragraphs*.

Write your report in complete
sentences and paragraphs.

Answer as many of the questions
below as possible in the text of your report.

*In your report give the source
you use (newspaper, web site, book, etc.)*

Give the original source of any
statistic, and/or the agency that collected it.

Include, as noted below, photocopies
or copies of key parts of your source.

There should be no duplicate topics
in the class.

Project
1 – Portrait of a statistic – Due Thursday Oct 3

Choose *one* statistical
variable with numerical values that are reported periodically (yearly or
monthly, for example) – this is called a time series - to describe in detail.
(An example of a time series is the ozone hole area table at the bottom of page
35.) What is your statistic called, what does it measure or represent (describe
this carefully), how often is it reported, what level does it cover (world,
U.S. or other country, state, local)? Some examples are world population, U.S.
GDP, California divorce rate, L.A. county home prices, leading major league
batting average. Where is the statistic originally published, what company,
agency, department or person collects the data, how is the data collected,
compiled or calculated? Describe the statistic’s trend over time, recent
behavior and latest reported level. If you find the information, describe any
changes in the definition of the statistic or collection method over time, why
and for whom the information is collected and published, how accurate the data
is. Include a copy of (no more than one page of) a table (**not a graph**)
that gives values of your statistic. Statistical handbooks can be found in the
school or local library. Many statistics are available online, from the UN, US
and other sources.

Project
2 – A graph of a statistic – Due Thursday Oct 17

Find a graph of statistical data in
a newspaper, magazine or journal article or online news source. Carefully
describe what data is presented. Does it come from a poll or survey, or from a
census of a whole population? What type of graph (line graph, pie chart, bar
chart, scatter plot) is used? Is the graph possibly misleading, for example,
does any axis start from a number other than zero, or change scale? Give an
example of how you read and interpret data from the graph by describing
carefully and fully a point or a few points on the graph. What conclusion do
you draw from the graph? Where did you find the graph? What information is
given about the source of the data? Include a copy of the graph.

Project
3 – Two related statistics – Due Thursday Nov 12

Find data on *two* related
variables for some type of entity, for example, population and GNP by country,
median income and average age by zip code, auto accident rate and speed limit by
state (*not* by year or time period). (An example of such *cross-section*
data is the airline table on page 101.) Select 15 of the entities (countries,
zip codes, or states) and list the selected entities and pairs of data. In your
report, include the name of your source of data, a short description of each of
the two variables, and how you selected your data, along with your list of
entities and data. Enter the 15 values of the two variables into a statistical
or spreadsheet program, make an xy-plot (scatter plot) of the data, and attach
it to your report. Use the statistical program or your calculator to find the
correlation coefficient. Does there appear to be a linear relationship between
the variables? Include a copy of one page of the original data you used for the
report or two pages if the data appear in separate tables.

Project
4 – A Statistical Study – Due Tuesday Nov 21

Find a study in a journal (possibly
related to your major), magazine or newspaper that describes a statistical
study in some detail. Give the source for this study. The study should give a
confidence interval(s), statistical error estimate(s), or significance level(s)
for data collected in the study. (The study should **not** be an exercise
for a statistics class.) Briefly describe how the study was done and what
person or group carried out and/or funded the study. (You may describe a part
of a long article.) What variable was observed or measured? How large was the
study group or sample? What population parameter, if any, was estimated? What
conclusion was reached, and how was the accuracy of the conclusion described?
What statistical test or technique was used? Include the article, or an
abstract or summary for a long article (no more than three pages).