On this Picostat.com statistics page, you will find information about the Airq data set which pertains to Air Quality for Californian Metropolitan Areas . The Airq data set is found in the Ecdat R package. Try to load the Airq data set in R by issuing the following command at the console data("Airq"). This may load the data into a variable called Airq. If R says the Airq data set is not found, you can try installing the package by issuing this command install.packages("Ecdat") and then attempt to reload the data with library("Ecdat") followed by data("Airq"). Perhaps strangley, if R gives you no output after entering a command, it means the command succeeded. If it succeeded you can see the data by typing Airq at the command-line which should display the entire dataset.
If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Airq R data set. The size of this file is about 1,079 bytes.
Air Quality for Californian Metropolitan Areas
a cross-section from 1972
number of observations : 30
observation : regional
country : United States
A dataframe containing :
indicator of air quality (the lower the better)
value added of companies (in thousands of dollars)
amount of rain (in inches)
is it a coastal area ?
population density (per square mile)
average income per head (in US dollars)
Verbeek, Marno (2004) A Guide to Modern Econometrics, John Wiley and Sons, chapter 4.
Dataset imported from https://www.r-project.org.