Choropleth maps are a means of visualizing spatial data by shading or patterning areas of a map in proportion to the values of a variable. This kind of map can provide insight into how a variable is distributed across a geographic area or the level of variability within a region.
Is your data not in the format of your favorite statistical package? Multiple files need to be merged and reformatted? You've been doing these tedious tasks by hand? There is a better way! Read about an example using a time series of Indian rainfall data.
Interactive visualizations of graph data can be valuable tools to understand relationships across a variety of domains. But how do you convert 4000 year old letters into a format that can be graphed? And then, how can you graph this data and share it with people?
The selection of a sampling method and sample size is a critical step in the applied research process. The choice depends on factors such as the focus and characteristics of the study, the research population and the effect sizes of interest.
Researchers in health economics often seek to evaluate the effect of a policy or medical intervention on healthcare costs by employing a two-part model. While the model readily provides the treatment effect estimate, obtaining its standard error could be slightly more involved.