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Chapter 3. Graphics. Getting Data. Bureau of Labor Statistics Census Bureau FRED-St. Louis Federal Reserve Penn World Tables Bos’s Homepage DRI S&P Database. Things to check. Reputation of data source Is your data nominal or real? Is your data seasonally adjusted?
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Chapter 3 Graphics
Getting Data • Bureau of Labor Statistics • Census Bureau • FRED-St. Louis Federal Reserve • Penn World Tables • Bos’s Homepage • DRI S&P Database
Things to check • Reputation of data source • Is your data nominal or real? • Is your data seasonally adjusted? • Is the data annualized? • Is the data expressed as a percentage? • KNOW WHAT YOU ARE MEASURING!
Graphs • Univariate • Time series plot • Histogram • Multivariate • Scatterplot • Bar Charts • Pie Chart
Items to check on a graph • Is there a linear relationship? • Is there seasonality? • Are there outliers? • Is the data roughly normally distributed?
Tricky graphs • Aspect Ratio • Chartjunk • Scale • Units