Pre-modeling EDA

Let's do some EDA with our experiment in mind. Lending Club has now asked you, their data scientist, to examine what effect their Lending Club-assigned loan grade variable has on the interest rate, int_rate. They're interested to see if the grade they assign the applicant during the process of applying for the loan affects the interest rate ultimately assigned to the applicant during the repayment process.

The lendingclub data has been loaded for you, as has dplyr and ggplot2.