Supporting Statistical Analysis for Research

## 5.1 Preparatory exercises

The skills in these exercise are used in the exercises at the end of the discourses of this chapter. Take a moment and complete these to confirm that you are prepared for this chapter. If these exercises are difficult, review the prior chapters.

1. Import the auto.csv data set.

2. Is there any missing data in the name column?

3. Are there any duplicated observations in the data set? Hint, look at the columns to determine what an observation is this data set.

4. Plot the horsepower, weight, and cylinders variables.

5. Does the plot from the prior problem show a relationship between horsepower and weight for all cylinder levels?