Supporting Statistical Analysis for Research

## 4.1 Preparatory exercises

The skills in these exercises 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 PSID.csv data set.

2. Plot earnings versus hours.

3. Make a boxplot of earnings with separate boxplots for each married status.

4. Make a horizontal boxplot of earnings with separate boxplots for each married status.

5. Do all of the categories of married make sense?

6. Plot earnings versus kids.

7. What can be learned from this plot?