2.8 Exercise

DO: Do the following steps for practice.

1. Import the file RheumArth_Exercise_Ch2.xlsx into R. The dataset should have 530 rows and 14 variables.
2. Use tabular and graphical inspection methods to look for data anomalies.
3. Bonus Challenge: Try to fix the errors, and check before vs. after to see if you succeeded. We will discuss more about Data Management in the next chapter.

NOTE: You cannot import a file into R when it is open on your computer. If you get an error, make sure the .xlsx file is not open.