Visualization of Harvard/MIT MOOC data

1. Go to the URL: https://dataverse.harvard.edu/file.xhtml?persistentId=doi:10.7910/DVN/26147/OCLJIV&version=10.0
2. Download the dataset HMXPC13_DI_v2_5-14-14.csv
3. Review the code book and documentation so that you understand the meaning of the variables
4. Upload the data into R as a dataframe
5. Create two dataframes that contain only the variables that interest you
6. Create two visualizations that explore the data, generate both a quick version using base R graphics and then a more refined version in ggplot