1. Bivariate Data Parallel Boxplots

2. Parallel boxplots are made up of several regular boxplots. They are drawn up on a common scale so they can be easily compared. Parallel boxplots are used to display a categorical and a numerical variable. The categorical variable is NOT limited to 2 categories.

3. Drawing boxplots When drawing boxplots, you need to show and label: 1.Heading(s) 2.Scale 3.Minimum and maximum values 4.Q1, median, Q3 5.Outliers (Answers in the textbook will sometimes not show outliers. However, you must always show them.)

4. Commenting and comparing When you are asked to comment on the distributions or compare the distributions you need to talk about: – Median – Skew (if any) – Range or spread

5. Example: Ex 2C, Q.1 Questions for you: Ex 2C, Q. 3 to 6