2. Key Concept: Statistical Displays
Main Idea
Key Concept: Statistical Displays
Example 1: Select an Appropriate Display
Example 2: Construct an Appropriate Display
Lesson Menu

3. Select an appropriate display for a set of data.
Main Idea/Vocabulary

4. Key Concept

5. Select an Appropriate Display
PATTERNS Select an appropriate display to show the sleep patterns of the average dog. Justify your reasoning.
Answer: Since the display will show the parts of a whole expressed as percents, a circle graph would be an appropriate display to represent these data.
Example 1

6. TEXT MESSAGES Select an appropriate display to show the spread of the number of text messages received by 50 students in one day. Justify your reasoning.
A. Since the display will show the parts of a whole, a circle graph would be an appropriate display to represent these data.
B. Since the data will be arranged in intervals, a histogram would be an appropriate display to represent these data.
C. Since the display will show the number of items in specific categories, a bar graph would be an appropriate display to represent these data.
D. Since the spread of the data is one measure of variation, a box-and-whisker plot would be an appropriate display to represent these data.
Example 1 CYP

7. Construct an Appropriate Display
LETTERS The table below lists the vowels in the quotation. Select an appropriate type of display for the data. Justify your reasoning. Then construct the display. “To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment.” Ralph Waldo Emerson
Example 2

8. Construct an Appropriate Display
Since the display will show the number of items in specific categories, a bar graph would be an appropriate display to represent these data.
Answer:
Example 2

9. B. box-and-whisker plot C. circle graph D. line plot
MUSIC The table below shows the lengths of the songs on Marissa’s MP3 player, rounded to the nearest half minute. Select an appropriate type of display for the data to show how many songs of each length she has. Then construct the display.
A. scatter plot
B. box-and-whisker plot
C. circle graph
D. line plot
Example 2 CYP