## 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.

### Stem and Leaf Displays

#### Questions

Question 1 out of 7.

A stem and leaf display is a good method of displaying large amounts of data.

• True
• False

Question 2 out of 7.

The highest value in the dataset is:

 13 | 212 | 2611 | 0345710 | 0112224455567889 | 0011123344455556667777898 | 0000112233333444445556667889999997 | 00001111136677788861000122234444555566777899995 | 13557788994 | 47893 | 4566892 | 591 | 9

Multiply stems by 10.0.

Question 3 out of 7.

 13 | 212 | 2611 | 0345710 | 011222445556788 9 | 001112334445555666777789 8 | 000011223333344444555666788999999 7 | 000011111366777888 6 | 00012223444455556677789999 5 | 1355778899 4 | 4789 3 | 456689 2 | 59 1 | 9

Multiply stems by 10.0.

Question 4 out of 7.
The largest value is:

 6 | 0 5 | 4 | 6 3 | 2244 2 | 1688 1 | 23667 0 | 457-0 | 1234679-1 | 011-2 | 2568

Multiply stems by 1.0.

Question 5 out of 7.
The smallest value is:

 6 | 0 5 | 4 | 6 3 | 2244 2 | 1688 1 | 23667 0 | 457-0 | 1234679-1 | 011-2 | 2568

Multiply stems by 1.0.

Question 6 out of 7.

Stem and leaf displays are good for comparing two groups.

• True
• False

Question 7 out of 7.

Stem and leaf displays are good for comparing three groups.

• True
• False