Case 2 - Air Pollution and Mortality
Researchers at
The Task
Use the data and multiple regression to produce a
thoughtful analysis of the question of the extent of the influence, if any, of
air pollution on mortality in SMSA's in the
Write up your analyses and results as a memo containing:
Comments
What is important for you is the mortality ratio that is Mortality/population. You can make a new column that calculates this ratio. Then try to see if other variables correlate with this variable or not. Variables like (HCPot, NOxPot, Rain, Income per capita –that is income divided by population, etc). You can find about these issues by drawing a simple scatter plot.
Then follow systematic investigations. Report the average
level of hydrocarbons (HC), nitrous oxide (NOx), and
sulfur dioxide (SO2) in the
Finally conduct simple and multiple regression analysis, where Mortality/population is your dependent variable. And a few other variables (or one when you are doing a simple regression) are you independent variables. Make sure all of the main three variables that we are interested to analyze will be included in your multiple regression analysis (i.e., HC, NOx, SO2).
[If you have used your 5 day bonus before, or you have not submitted your first case, you should submit the case on time!]
Source: The Data and Story Library of Carnegie Melon University
Datafile Name: SMSA
Datafile Subjects: Environment
Story Names: Air Pollution and Mortality
Reference:
Authorization: free use
Description: Properties of 60
Standard Metropolitan Statistical Areas (a standard Census Bureau designation
of the region around a city) in the
The data include information on the social and economic conditions in these areas, on their climate, and some indices of air pollution potentials.
Number of cases: 59 [one of the 60 deleted because of missing data]
Data definitions:
Variable |
Definition |
City |
City name |
JanTemp |
Mean January temperature (degrees Fahrenheit) |
JulyTemp |
Mean July temperature (degrees Fahrenheit) |
RelHum |
Relative Humidity |
Rain |
Annual rainfall (inches) |
Mortality |
Age adjusted mortality |
Education |
Median education |
PopDensity |
Population density |
%NonWhite |
Percentage of non whites |
%WC |
Percentage of white collar workers |
Pop |
Population |
Pop/house |
Population per household |
Income |
Median income |
HCPot |
Hydrocarbon pollution potential |
NOxPot |
Nitrous Oxide pollution potential |
SO2Pot |
Sulfur Dioxide pollution potential |