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Unformatted text preview: Math 127B, Basic R, Lecture 5 Mrinal Raghupathi Monday, April 18, 2011 Administrivia Today we will practice some more. You wont learn too many new things. Reminders 1. This weeks recitation will again be like a lab for R, in-class. 1 American quickfacts dataset Todays data is from the census bureau. The data is in a file called county.dat . The file uses commas to separate the columns and does not have a header row. So we need to specify what the columns are. The first column is the name of the county, the second is the two-letter abbreviation for the state. The next three columns are the countys population, the size of the county labor force and the number of unemployed. Our objective will be to answer some basic questions about the population. Here are some problems? 1. What is the most highly populated county in the US? 2. What is the unemployment rate in each county? 3. Which ten counties have the highest unemployment rate? 4. What are the unemployment rates in the 10 biggest counties? 5. Which state has the highest unemployment rate? 6. How does the unemployment rate in your state compare to Tennessee, or the nation as a whole? How does the rate in your home county compare to the state in which you live?...
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