## Graphing

Read these sections and complete the questions at the end of each section. First, we'll look at the available methods to portray distributions of quantitative variables. Then, we'll introduce the stem and leaf plot and how to capture the frequency of your data. We'll also discuss box plots for the purpose of identifying outliers and for comparing distributions and bar charts for quantitative variables. Finally, we'll talk about line graphs, which are based on bar graphs.

### Box Plots

#### Questions

**Question 1 out of 6.**

What is the upper hinge?

- B
- C
- D
- F

**Question 2 out of 6.**

What is the median?

- D
- E
- F
- G

**Question 3 out of 6.**

C is the

- upper adjacent value
- balance line
- H-spread
- outside line

**Question 4 out of 6.**

The H-spread is:

- C-H
- D-G
- E-F

**Question 5 out of 6.**

Which of the following is/are true?

- The median is higher than the mean.
- There is one far out value.
- The lowest value is H.
- There is an outside value, but no far out value.
- The highest value is C.

**Question 6 out of 6.**

Box plots are preferable to stem and leaf displays when

- there is a large amount of data.
- it is important to show individual data values.
- three or more groups are to be compared.
- the distribution is skewed.